providers/proxy: add traefik labels to outposts deployed with docker integration

passbook/providers/proxy/controllers/docker.py

@@ -1,6 +1,10 @@
 """Proxy Provider Docker Contoller"""
+from typing import Dict
+from urllib.parse import urlparse
+
 from passbook.outposts.controllers.docker import DockerController
 from passbook.outposts.models import Outpost
+from passbook.providers.proxy.models import ProxyProvider
 
 
 class ProxyDockerController(DockerController):
@@ -12,3 +16,14 @@ class ProxyDockerController(DockerController):
             "http": 4180,
             "https": 4443,
         }
+
+    def _get_labels(self) -> Dict[str, str]:
+        hosts = []
+        for proxy_provider in ProxyProvider.objects.filter(outpost__in=[self.outpost]):
+            proxy_provider: ProxyProvider
+            external_host_name = urlparse(proxy_provider.external_host)
+            hosts.append(external_host_name)
+        return {
+            "traefik.frontend.rule": f"Host:{','.join(hosts)}",
+            "traefik.port": "4180",
+        }