refactor: add https and acme to traefik

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

@@ -1,3 +1,5 @@
+{% from "contrib/compose_helpers.j2" import traefik_labels with context %}
+{##}
 version: "3.7"
 
 networks:
@@ -10,9 +12,7 @@ services:
     image: gitea/gitea:1.18
     container_name: gitea_server
     labels:
-      - traefik.enable=true
-      - traefik.http.routers.gitea.rule=Host(`gitea.{{ domain }}`)
-      - traefik.http.services.gitea.loadbalancer.server.port=3000
+      - {{ traefik_labels("gitea", port="3000") | indent(6) }}
     restart: unless-stopped
     env_file:
       - .env.gitea