add traefik config to pad container

docker-containers/pad/docker-compose.yml

@@ -39,10 +39,22 @@ services:
       - VIRTUAL_HOST=pad.cttue.de
       - VIRTUAL_PORT=3000
       - LETSENCRYPT_HOST=pad.cttue.de
+    labels:
+      - traefik.enable=true
+      - traefik.docker.network=traefik
+      - traefik.http.routers.pad.entrypoints=web-secure
+      - traefik.http.routers.pad.service=pad
+      - traefik.http.routers.pad.rule=Host(`pad.cttue.de`)
+      - traefik.http.routers.pad.tls=true
+      - traefik.http.routers.pad.tls.certResolver=default
+      - traefik.http.routers.pad.tls.domains[0]=pad.cttue.de
+      - traefik.http.routers.pad.tls.domains[0].sans=test.pad.cttue.de
+      - traefik.http.services.pad.loadbalancer.server.port=3000
     volumes:
       - ./uploads:/hedgedoc/public/uploads
     networks:
       cttue_web_services:
+      traefik:
     restart: always
     depends_on:
       - database
@@ -50,3 +62,5 @@ services:
 networks:
   cttue_web_services:
     external: true
+  traefik:
+    external: true