Setup/https.md

+## Sharing GitLab https setup
+
+Sharing GitLab is running in a container.
+
+In order to run on native ssl, the following changes where applied to `/etc/gitlab/gitlab.rb` (see [Gitlab ssl](https://docs.gitlab.com/omnibus/settings/ssl.html)):
+
+```external_url "https://sharing-codeability.uibk.ac.at/"         # Must use https protocol```
+
+GitLab now runs with a self signed certificate behind Port 10083 mapped to 443.
+
+Additionally the apache configuration in `/etc/apache2/sites-available/default-ssl.conf` was changed
+
+```
+        SSLProxyVerify none
+        SSLProxyCheckPeerCN off
+        SSLProxyCheckPeerName off
+        SSLProxyCheckPeerExpire off
+ 
+
+        ProxyPass / https://xxxx:443/
+        ProxyPassReverse / https://xxxx:443/
+
+```
+Where xxxx stands for the ip-number of the docker image.
+
+TODO: make Apache configuration resilient to ip number changes
+
+
+