Have you looked at PM2? Digitalocean has published quite nice tutorial.

I looked at https://forum.qt.io/ categories/subcategories layout and it is very convenient, especially when you have many subcategories. Any tips on how to implement similar solution?

Transifex has CLI client - so you don't need to manually download all translation files.

Introduction to the Client | Transifex Documentation

Yes, NodeBB uses ImageMagick.

https://github.com/NodeBB/NodeBB/blob/7d0eb9afaa0ac51b814cfaf733d98c8259c64742/src/image.js

@pichalite Problem is in Persona theme, not NodeBB itself.

Extract all data for one user:
example on this forum: https://community.nodebb.org/api/user/egut

Deleting a user:
Write API plugin
https://github.com/NodeBB/nodebb-plugin-write-api

Not that I know of. Aren't they self-describing?
Could you explain where exactly are you stuck?

Any ideas? I tried installing older version of socket.io (1.4.8 instead of 1.7.1), made no difference.

I have dockerized existing Nodebb installation, transfered db to docker container too. Threads are shown correctly but I can't login at all - nodebb.example.com/login returns "Forbidden".

In front of nodebb there is reverse proxy. I get following errors when trying to login:

/ # npm -v
4.4.4
/ # node --version
v7.9.0

Log

app_1      | NodeBB v1.1.2 Copyright (C) 2013-2014 NodeBB Inc.
app_1      | This program comes with ABSOLUTELY NO WARRANTY.
app_1      | This is free software, and you are welcome to redistribute it under certain conditions.
app_1      | For the full license, please visit: http://www.gnu.org/copyleft/gpl.html
app_1      | 
app_1      | Clustering enabled: Spinning up 1 process(es).
app_1      | 
app_1      | 4/5 06:57 [21] - verbose: * using configuration stored in: /opt/nodebb/NodeBB-1.1.2/config.json
app_1      | 4/5 06:57 [21] - info: Time: Thu May 04 2017 06:57:39 GMT+0000 (UTC)
app_1      | 4/5 06:57 [21] - info: Initializing NodeBB v1.1.2
app_1      | 4/5 06:57 [21] - verbose: * using mongo store at mongodb:27017
app_1      | 4/5 06:57 [21] - verbose: * using themes stored in: /opt/nodebb/NodeBB-1.1.2/node_modules
app_1      | 4/5 06:57 [21] - info: [database] Checking database indices.
app_1      | 4/5 06:57 [21] - verbose: Checking dependencies for outdated modules
app_1      | 4/5 06:57 [21] - verbose: [notifications.init] Registering jobs.
app_1      | 4/5 06:57 [21] - info: [themes] Using theme nodebb-theme-persona
app_1      | 4/5 06:57 [21] - verbose: [plugins] Initializing plugins system
app_1      | 4/5 06:57 [21] - verbose: [plugins] Found 5 js file(s) for plugin nodebb-theme-persona
app_1      | 4/5 06:57 [21] - verbose: [plugins/load] File found: /opt/nodebb/NodeBB-1.1.2/node_modules/nodebb-theme-persona/lib/persona.js
app_1      | 4/5 06:57 [21] - verbose: [plugins/load] File found: /opt/nodebb/NodeBB-1.1.2/node_modules/nodebb-theme-persona/lib/modules/nprogress.js
app_1      | 4/5 06:57 [21] - verbose: [plugins/load] File found: /opt/nodebb/NodeBB-1.1.2/node_modules/nodebb-theme-persona/lib/modules/autohidingnavbar.min.js
app_1      | 4/5 06:57 [21] - verbose: [plugins/load] File found: /opt/nodebb/NodeBB-1.1.2/node_modules/nodebb-theme-persona/lib/modules/slideout.min.js
app_1      | 4/5 06:57 [21] - verbose: [plugins/load] File found: /opt/nodebb/NodeBB-1.1.2/node_modules/nodebb-theme-persona/lib/client/chats.js
app_1      | 4/5 06:57 [21] - verbose: [plugins] Found 1 ACP js file(s) for plugin nodebb-theme-persona
app_1      | 4/5 06:57 [21] - verbose: [plugins/load] File found: /opt/nodebb/NodeBB-1.1.2/node_modules/nodebb-theme-persona/lib/admin.js
app_1      | 4/5 06:57 [21] - verbose: [plugins] Loaded plugin: nodebb-theme-persona
app_1      | 4/5 06:57 [21] - verbose: [plugins] Found 1 less file(s) for plugin nodebb-plugin-composer-default
app_1      | 4/5 06:57 [21] - verbose: [plugins] Found 2 js file(s) for plugin nodebb-plugin-composer-default
app_1      | 4/5 06:57 [21] - verbose: [plugins/load] File found: /opt/nodebb/NodeBB-1.1.2/node_modules/nodebb-plugin-composer-default/static/lib/client.js
app_1      | 4/5 06:57 [21] - verbose: [plugins/load] File not found: /opt/nodebb/NodeBB-1.1.2/node_modules/nodebb-plugin-composer-default/node_modules/screenfull/dist/screenfull.js (Ascending)
app_1      | 4/5 06:57 [21] - verbose: [plugins/load] File found: /opt/nodebb/NodeBB-1.1.2/node_modules/screenfull/dist/screenfull.js
app_1      | 4/5 06:57 [21] - verbose: [plugins] Found 1 ACP js file(s) for plugin nodebb-plugin-composer-default
app_1      | 4/5 06:57 [21] - verbose: [plugins/load] File found: /opt/nodebb/NodeBB-1.1.2/node_modules/nodebb-plugin-composer-default/static/lib/admin.js
app_1      | 4/5 06:57 [21] - verbose: [plugins] Found 10 AMD-style module(s) for plugin nodebb-plugin-composer-default
app_1      | 4/5 06:57 [21] - verbose: [plugins] Loaded plugin: nodebb-plugin-composer-default
app_1      | 4/5 06:57 [21] - verbose: [plugins] Found 1 less file(s) for plugin nodebb-plugin-markdown
app_1      | 4/5 06:57 [21] - verbose: [plugins] Found 1 js file(s) for plugin nodebb-plugin-markdown
app_1      | 4/5 06:57 [21] - verbose: [plugins/load] File found: /opt/nodebb/NodeBB-1.1.2/node_modules/nodebb-plugin-markdown/public/js/client.js
app_1      | 4/5 06:57 [21] - verbose: [plugins] Found 1 ACP js file(s) for plugin nodebb-plugin-markdown
app_1      | 4/5 06:57 [21] - verbose: [plugins/load] File found: /opt/nodebb/NodeBB-1.1.2/node_modules/nodebb-plugin-markdown/public/js/admin.js
app_1      | 4/5 06:57 [21] - verbose: [plugins] Found 1 AMD-style module(s) for plugin nodebb-plugin-markdown
app_1      | 4/5 06:57 [21] - verbose: [plugins] Loaded plugin: nodebb-plugin-markdown
app_1      | 4/5 06:57 [21] - verbose: [plugins] Found 1 less file(s) for plugin nodebb-plugin-mentions
app_1      | 4/5 06:57 [21] - verbose: [plugins] Found 1 js file(s) for plugin nodebb-plugin-mentions
app_1      | 4/5 06:57 [21] - verbose: [plugins/load] File found: /opt/nodebb/NodeBB-1.1.2/node_modules/nodebb-plugin-mentions/static/autofill.js
app_1      | 4/5 06:57 [21] - verbose: [plugins] Loaded plugin: nodebb-plugin-mentions
app_1      | 4/5 06:57 [21] - verbose: [plugins] Found 1 css file(s) for plugin nodebb-widget-essentials
app_1      | 4/5 06:57 [21] - verbose: [plugins] Loaded plugin: nodebb-widget-essentials
app_1      | 4/5 06:57 [21] - verbose: [plugins] Found 1 js file(s) for plugin nodebb-rewards-essentials
app_1      | 4/5 06:57 [21] - verbose: [plugins/load] File found: /opt/nodebb/NodeBB-1.1.2/node_modules/nodebb-rewards-essentials/static/lib/main.js
app_1      | 4/5 06:57 [21] - verbose: [plugins] Loaded plugin: nodebb-rewards-essentials
app_1      | 4/5 06:57 [21] - verbose: [plugins] Loaded plugin: nodebb-plugin-soundpack-default
app_1      | 4/5 06:57 [21] - verbose: [plugins] Found 1 less file(s) for plugin nodebb-plugin-emoji-extended
app_1      | 4/5 06:57 [21] - verbose: [plugins] Found 1 js file(s) for plugin nodebb-plugin-emoji-extended
app_1      | 4/5 06:57 [21] - verbose: [plugins/load] File found: /opt/nodebb/NodeBB-1.1.2/node_modules/nodebb-plugin-emoji-extended/public/scripts/
app_1      | 4/5 06:57 [21] - verbose: [plugins] Loaded plugin: nodebb-plugin-emoji-extended
app_1      | 4/5 06:57 [21] - verbose: [plugins] Loaded plugin: nodebb-plugin-emoji-one
app_1      | 4/5 06:57 [21] - verbose: [plugins] Loaded plugin: nodebb-plugin-dbsearch
app_1      | 4/5 06:57 [21] - info: [plugins] Plugins OK
app_1      | 4/5 06:57 [21] - verbose: [meta/js] 14 of 14 modules bridged
app_1      | 4/5 06:57 [21] - verbose: [plugins] Loading templates (nodebb-theme-persona)
app_1      | 4/5 06:57 [21] - verbose: [plugins] Loading templates (nodebb-plugin-composer-default)
app_1      | 4/5 06:57 [21] - verbose: [plugins] Loading templates (nodebb-plugin-markdown)
app_1      | 4/5 06:57 [21] - verbose: [plugins] Loading templates (nodebb-widget-essentials)
app_1      | 4/5 06:57 [21] - verbose: [plugins] Loading templates (nodebb-plugin-emoji-extended)
app_1      | 4/5 06:57 [21] - verbose: [plugins] Loading templates (nodebb-plugin-dbsearch)
app_1      | 4/5 06:57 [21] - verbose: [meta/templates] Compiling templates
app_1      | 4/5 06:57 [21] - verbose: [meta/templates] Successfully compiled templates.
app_1      | 4/5 06:57 [21] - verbose: [meta/js] Minifying nodebb.min.js
app_1      | [minifier] file not found, node_modules/socket.io-client/socket.io.js
app_1      | 4/5 06:57 [21] - verbose: [meta/js] nodebb.min.js minification complete
app_1      | 4/5 06:57 [21] - verbose: [meta/js] Minifying acp.min.js
app_1      | [minifier] file not found, node_modules/socket.io-client/socket.io.js
app_1      | 4/5 06:57 [21] - verbose: [meta/js] acp.min.js minification complete
app_1      | 4/5 06:57 [21] - verbose: [meta/css] Minifying LESS/CSS
app_1      | 4/5 06:57 [21] - verbose: [meta/css] stylesheet.css committed to disk.
app_1      | 4/5 06:57 [21] - verbose: [meta/css] admin.css committed to disk.
app_1      | 4/5 06:57 [21] - info: NodeBB Ready
app_1      | 4/5 06:57 [21] - info: Enabling 'trust proxy'
app_1      | 4/5 06:57 [21] - info: NodeBB is now listening on: 0.0.0.0:4567
app_1      | 4/5 06:57 [21] - verbose: [sounds] Sounds OK
app_1      | 4/5 06:57 [21] - verbose: [meta/blacklist] Loading 0 blacklist rules
app_1      | 4/5 06:57 [21] - verbose: [hotswap] Router with id `plugins` replaced successfully
app_1      | 4/5 06:57 [21] - verbose: [plugins] All plugins reloaded and rerouted
app_1      | 4/5 06:57 [21] - verbose: [hotswap] Router with id `auth` replaced successfully
app_1      | 4/5 06:58 [21] - warn: Route requested but not found: /customHP
app_1      | 4/5 06:58 [21] - warn: Route requested but not found: /customHP
app_1      | 4/5 06:58 [21] - error: /login
app_1      |  invalid csrf token

config.json

{
    "url": "https://nodebb.example.com",
    "secret": "xxxxxxxxxxxxxx",
    "database": "mongo",
    "port": 4567,
    "mongo": {
        "host": "mongodb",
        "port": "27017",
        "username": "xxxxx",
        "password": "xxxxx",
        "database": "nodebb"
    },
    "socket.io": {
        "transports": ["websocket", "polling"],
        "address": "nodebb.example.com"
    }
}

Dockerfile

FROM mhart/alpine-node:4
ENV NODEBB_VERSION 1.1.2

RUN mkdir -p /opt/nodebb \
 && addgroup nodebb \
 && adduser -S -G nodebb -h /opt/nodebb -D nodebb \
 && chown -R nodebb:nodebb /opt/nodebb
RUN apk --update add curl

USER nodebb

RUN cd /opt/nodebb \
 && curl -L https://github.com/NodeBB/NodeBB/archive/v${NODEBB_VERSION}.tar.gz -o v${NODEBB_VERSION}.tar.gz \
 && tar xzf v${NODEBB_VERSION}.tar.gz 
 
RUN cd /opt/nodebb/NodeBB-${NODEBB_VERSION} && npm install --production

VOLUME ["/opt/nodebb/NodeBB-${NODEBB_VERSION}/public/uploads"]
CMD ["/bin/sh", "-c", "cd /opt/nodebb/NodeBB-${NODEBB_VERSION} && node app"]
EXPOSE 4567

Containers are setup with docker-compose, separate container for nodebb and database. Nodebb container is started with command: ["/bin/sh", "-c", "cd /opt/nodebb/NodeBB-1.1.2/ && ./nodebb dev"]

nginx conf

# If we receive X-Forwarded-Proto, pass it through; otherwise, pass along the
# scheme used to connect to this server
map $http_x_forwarded_proto $proxy_x_forwarded_proto {
  default $http_x_forwarded_proto;
  ''      $scheme;
}
# If we receive X-Forwarded-Port, pass it through; otherwise, pass along the
# server port the client connected to
map $http_x_forwarded_port $proxy_x_forwarded_port {
  default $http_x_forwarded_port;
  ''      $server_port;
}
# If we receive Upgrade, set Connection to "upgrade"; otherwise, delete any
# Connection header that may have been passed to this server
map $http_upgrade $proxy_connection {
  default upgrade;
  '' close;
}
# Set appropriate X-Forwarded-Ssl header
map $scheme $proxy_x_forwarded_ssl {
  default off;
  https on;
}
gzip_types text/plain text/css application/javascript application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;
log_format vhost '$host $remote_addr - $remote_user [$time_local] '
                 '"$request" $status $body_bytes_sent '
                 '"$http_referer" "$http_user_agent"';
access_log off;
# HTTP 1.1 support
proxy_http_version 1.1;
proxy_buffering off;
proxy_set_header Host $http_host;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $proxy_connection;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $proxy_x_forwarded_proto;
proxy_set_header X-Forwarded-Ssl $proxy_x_forwarded_ssl;
proxy_set_header X-Forwarded-Port $proxy_x_forwarded_port;
# Mitigate httpoxy attack (see README for details)
proxy_set_header Proxy "";
server {
    server_name _; # This is just an invalid value which will never trigger on a real hostname.
    listen 80;
    access_log /var/log/nginx/access.log vhost;
    return 503;
}

# nodebb.example.com
upstream nodebb.example.com {
        ## Can be connect with "back" network
      # nodebb_app_1
      #docker container IP
      server 172.21.0.2:4567;
}
server {
  server_name nodebb.example.com.com;
  listen 80 ;
  access_log /var/log/nginx/access.log vhost;
  return 301 https://$host$request_uri;
}
server {
  server_name nodebb.example.com;
  listen 443 ssl http2 ;
  access_log /var/log/nginx/access.log vhost;
  ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
  ssl_ciphers 'ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AE
S128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-
SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA:ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-
SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:!DSS';
  ssl_prefer_server_ciphers on;
    ssl_session_timeout 5m;
    ssl_session_cache shared:SSL:50m;
    ssl_session_tickets off;
    ssl_certificate /etc/nginx/certs/nodebb.example.com.crt;
    ssl_certificate_key /etc/nginx/certs/nodebb.example.com.key;
    ssl_dhparam /etc/nginx/certs/nodebb.example.com.dhparam.pem;
    add_header Strict-Transport-Security "max-age=31536000";
    include /etc/nginx/vhost.d/default;
    location / {
      proxy_pass http://nodebb.example.com;
    }
  }

I ran into similar problem some while ago and I used tags as a temporary solution. YMMV.

Not that I know of. Aren't they self-describing?
Could you explain where exactly are you stuck?

Transifex has CLI client - so you don't need to manually download all translation files.

Introduction to the Client | Transifex Documentation

I must've missed 'Default user settings' part. Thanks!

I am aware of system group named registered-users which includes everyone, but I want to have "special" separated group of users beside registered-users.

I also noticed that when user is logged in one can see emails of all users on their profile page. Is it possible to turn this feature off? Or have I overlooked it in settings?

Seems like similar error which I've been experiencing lately (although I'm not using CentOs): https://community.nodebb.org/topic/9886/invalid-csrf-token/3

Perhaps we can figure it out together. Have you tried using older version like 1.1.2?

@julian Error seems to be occuring mostly to users using Safari (both mobile and desktop - MacOS). I don't have access to server right now, but will post additional data ASAP.