fix delete connection POST request

deployment/docker-compose.yml

@@ -38,7 +38,7 @@ services:
     # Optionally expose code to other services (read-only)
     # - ./:/srv/webssh:ro
     healthcheck:
-      test: ["CMD", "curl", "-f", "http://localhost:8080/"]
+      test: ["CMD", "python", "-c", "import sys, urllib.request; sys.exit(0 if urllib.request.urlopen('http://127.0.0.1:8080/', timeout=5).getcode() == 200 else 1)"]
       interval: 30s
       timeout: 10s
       retries: 3