If you are using nodebb-plugin-emoji-extended then there is a 'dirty' fix for that.
Navigate to your Emoji plugin folder and open index.js.
Example path: /home/nodebb/node_modules/nodebb-plugin-emoji-extended/index.js.
Once you've opened the file, find a part where it states emojiPath="http://127.0.0.1:4567/plugins/nodebb-plugin-emoji/images/".
Set this to something like this emojiPath="http://forum.domain.com/plugins/nodebb-plugin-emoji-extended/images"
Of course, this will only work if you are running NodeBB with nginx or Apache proxy.
Never tried that plugin although i know it's paid, but are those pluings that apears on APC installable ? i won't they crash my nodebb ? i also need a 'teamspeak' plugin and a 'gametracker' like plugin, could you please suggest me a pluing for them ?