Add mediaserver, rm .gitignore, FQCN, Jellyfin

- Added development "mediaserver" playbook for testing
- rm .gitignore in roles dir since no external ansible roles are used
- Update a part of the base role to use FQCN for linting
- Added "jellyfin" role to install Jellyfin with docker-compose
- Updated Traefik to use the loopback for default web entry points
- Simplified Traefik docker-compose vars, Ansible sets defaults

roles/traefik/templates/docker-compose.yml.j2

@@ -9,9 +9,9 @@ services:
     image: "traefik:${traefik_version}"
     container_name: "${traefik_name}"
     ports:
-      - "${traefik_web_entry:-80:80}"
+      - "${traefik_web_entry}:80"
 {% if traefik_standalone and not traefik_http_only %}
-      - "${traefik_websecure_entry:-443:443}"
+      - "${traefik_websecure_entry}:443"
 {% endif %}
     networks:
       - traefik
@@ -19,7 +19,7 @@ services:
       - "traefik.http.routers.traefik.rule=Host(`{{ traefik_domain }}`)"
       - "traefik.http.routers.traefik.service=api@internal"
       - "traefik.docker.network=traefik"
-      - "traefik.enable=${traefik_dashboard:-false}"
+      - "traefik.enable=${traefik_dashboard}"
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock
       - "{{ traefik_root }}/config:/etc/traefik"