You don't run ./nodebb setup to upgrade.pkill -9 node to kill off NodeBB running on the machine. ./nodebb upgrade to upgrade ./nodebb start to start
As for search... try re-indexing the forum content from the DB Search plugin page in the ACP.
Everything seems to be running fine except the admin panel looks strange.
The site title is acp-title. The active users area and plugin install area also look weird as evidenced in the images below.
Any thoughts on what I might have done wrong? This was my first time upgrading. Went from 1.4.0 to 1.4.2 using the documentation here (https://nodebb.readthedocs.io/en/latest/upgrading/index.html)
You have this issue:
It's fixed in master, wait for next release or change your reverse proxy settings.