docs(delegation): Add compose examples

Previous projects used split-domain examples, so it's good to add back

docs/public/advanced/delegated.docker-compose.for-traefik.yml

@@ -0,0 +1,44 @@
+# Continuwuity - Behind Traefik Reverse Proxy
+
+services:
+  homeserver:
+    image: forgejo.ellis.link/continuwuation/continuwuity:latest
+    restart: unless-stopped
+    command: /sbin/conduwuit
+    volumes:
+      - db:/var/lib/continuwuity
+      - ./continuwuity-resolv.conf:/etc/resolv.conf # use custom resolvers rather than Docker's
+      #- ./continuwuity.toml:/etc/continuwuity.toml
+    networks:
+      - proxy
+    labels:
+      - "traefik.enable=true"
+      - "traefik.http.routers.continuwuity.rule=(Host(`matrix.example.com`) || (Host(`example.com`) && PathPrefix(`/.well-known/matrix`)))"
+      - "traefik.http.routers.continuwuity.entrypoints=websecure" # your HTTPS entry point
+      - "traefik.http.routers.continuwuity.tls=true"
+      - "traefik.http.routers.continuwuity.service=continuwuity"
+      - "traefik.http.services.continuwuity.loadbalancer.server.port=8008"
+      # possibly, depending on your config:
+      # - "traefik.http.routers.continuwuity.tls.certresolver=letsencrypt"
+    environment:
+      CONTINUWUITY_SERVER_NAME: example.com # EDIT THIS
+      CONTINUWUITY_DATABASE_PATH: /var/lib/continuwuity
+      CONTINUWUITY_ADDRESS: 0.0.0.0
+      CONTINUWUITY_PORT: 8008 # This must match with traefik's loadbalancer label
+      #CONTINUWUITY_CONFIG: '/etc/continuwuity.toml' # Uncomment if you mapped config toml above
+
+      # Serve .well-known files to tell others to reach Continuwuity on port :443
+      CONTINUWUITY_WELL_KNOWN: |
+        {
+        client=https://matrix.example.com,
+        server=matrix.example.com:443
+        }
+
+volumes:
+  db:
+
+networks:
+  # This is the network Traefik listens to, if your network has a different
+  # name, don't forget to change it here and in the docker-compose.override.yml
+  proxy:
+    external: true