Add GPG key and reorganize dockerbox configuration

- Add new primary GPG key in dev config for compose repos
- Slight reorganization of the dockerbox production playbook
- Remove group management in the docker role
- Move HSTS inside the location block
- Add git ignore entry for .ansible files
- Add X-Forwarded-Proto proxy header

.gitignore

@@ -1,4 +1,5 @@
+.ansible*
+/environments/
 .playbook
 .vagrant*
 .vscode
-/environments/