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

roles/proxy/templates/server-nginx.conf.j2

@@ -28,13 +28,13 @@ server {
   ssl_certificate     /etc/ssl/certs/nginx-selfsigned.crt;
   ssl_certificate_key /etc/ssl/private/nginx-selfsigned.key;
 {% endif %}
-{% if item.hsts is defined %}
-  add_header Strict-Transport-Security "max-age={{ item.hsts }}" always;
-{% endif %}
 {% if item.client_max_body_size is defined %}
   client_max_body_size {{ item.client_max_body_size }};
 {% endif %}
   location / {
+{% if item.hsts is defined %}
+    add_header Strict-Transport-Security "max-age={{ item.hsts }}" always;
+{% endif %}
 {% if item.allowedips is defined %}
 {% for ip in item.allowedips %}
     allow {{ ip }};
@@ -49,6 +49,7 @@ server {
     proxy_set_header Host $host;
     proxy_set_header X-Real-IP $remote_addr;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto $scheme;
     proxy_pass {{ item.proxy_pass }};
 {% if item.proxy_ssl_verify is defined and item.proxy_ssl_verify is false %}
     proxy_ssl_verify off;