fix TLS issue

[diranetafen]

Fix issue when enabling SSL in docker-compose file. Nginx is not configured properly to use API through HTTPS.

[lifenautjoe]

Hey @diranetafen , are events working for you with this setting?

[benhutchins]

Nginx wouldn't want use Taiga through SSL. The idea is that the Nginx server provides SSL to external requests, but the in-container requests from Nginx to the Taiga server (currently using django dev server, may later use gunicorn) wouldn't use SSL.

The main issue with this is that the django web server does not provide SSL, so you can't use https://127.0.0.1:8000.

TO @lifenautjoe, events, if it exists, is a separate docker container, so the change made here also doesn't work. Unless Taiga merged events into core and I missed that news.