Inline debugging in an IDE is tricky to get set up. The best way is to set up a local development copy of Discourse. When developing locally, changes to code update live, so you don’t even have to restart the server! The easiest way to get started with that is:
Alternatively…
This is not ‘recommended’, but if you want to stick with making changes on your production instance, you can speed things up by getting a terminal inside the docker container
/var/discourse/launcher enter app
and then editing files directly
vi /var/www/discourse/plugins/discourse-openid-connect/......
and then restarting the server manually from within the container
sv restart unicorn