Add note to readme.md

README.md

@@ -17,7 +17,11 @@ docker-compose build
 The first time you run the bot, you should use the flags --sync-commands and --sync-db to automatically set up your bot commands & database tables.
 You can do this by commenting out the line in your `docker-compose.yml`.
 
+Note: If you want to use it on one guild only (via dev-mode in your config.json), you'll need to invite the bot with the `bot+applications.commands` scope, as opposed to just `applications.commands`.
+
 After that, you run the following command.
 ```shell
 docker-compose up -d
 ```
+
+You'll then need to setup a HTTP proxy to port `:4567` on your server, and add this URL to the http interactions endpoint of your discord application.