docker-compose.yml - reverse proxy the jellyfin container as virtual host

we need to take it of host network mode, add it to the proxy-tier and
default networks, then enable proxying and lets-encrypt.

Tested, works.

templates/docker-compose/docker-compose.yml

@@ -124,9 +124,11 @@ services:
       - jellyfin_config:/config
       - jellyfin_cache:/cache
       - minidlna_data:/media
-    network_mode: host
-    environment:
-      - JELLYFIN_PublishedServerUrl=http://snackpot.local
+    networks:
+      - proxy-tier
+      - default
+    env_file:
+      - jellyfin.env
       
   minidlna:
     image: vladgh/minidlna:latest

templates/docker-compose/jellyfin.env.j2

@@ -0,0 +1,4 @@
+VIRTUAL_HOST={{ jellyfin_hostname }}
+JELLYFIN_PublishedServerUrl=https://{{ jellyfin_hostname }}/
+LETSENCRYPT_HOST={{ jellyfin_hostname }}
+LETSENCRYPT_EMAIL={{ letsencrypt_email }}