[mastodon] Add nginx-proxy configuration

mastodon/docker-compose.yaml

@@ -34,6 +34,11 @@ services:
     networks:
       - external_network
       - internal_network
+      - webproxy
+    environment:
+      - VIRTUAL_HOST=mastodon.jfreudenberger.de
+      - VIRTUAL_PORT=3000
+      - LETSENCRYPT_HOST=mastodon.jfreudenberger.de
     healthcheck:
       test: ['CMD-SHELL',"curl -s --noproxy localhost localhost:3000/health | grep -q 'OK' || exit 1"]
     depends_on:
@@ -76,6 +81,9 @@ networks:
   external_network:
   internal_network:
     internal: true
+  webproxy:
+    external:
+      name: webproxy
 
 volumes:
   system: