refactor: migrate browser gateway to native xvfb

compose.yaml

@@ -21,9 +21,9 @@ services:
       - /tmp:size=16m,noexec,nosuid,nodev
     cap_drop: [ALL]
     security_opt: [no-new-privileges:true]
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
     depends_on:
-      docker-gateway:
-        condition: service_healthy
       postgres:
         condition: service_healthy
     networks: [control]
@@ -65,32 +65,6 @@ services:
     networks: [control]
     restart: unless-stopped
 
-  docker-gateway:
-    build: .
-    stop_grace_period: 45s
-    command: ["python3", "-m", "cmd.docker_gateway.gateway"]
-    labels:
-      io.creatorhub.gateway-member: "true"
-    environment:
-      BROWSER_NETWORK: creatorhub_browser
-      GATEWAY_TOKEN: ${GATEWAY_TOKEN:-dev-creatorhub-gateway-token}
-    volumes:
-      - /var/run/docker.sock:/var/run/docker.sock:ro
-    group_add:
-      - "${DOCKER_GID:?required}"
-    healthcheck:
-      test: [CMD, wget, -q, -O, /dev/null, http://127.0.0.1:8081/healthz]
-      interval: 2s
-      timeout: 2s
-      retries: 15
-    read_only: true
-    tmpfs:
-      - /tmp:size=16m,noexec,nosuid,nodev
-    cap_drop: [ALL]
-    security_opt: [no-new-privileges:true]
-    networks: [control]
-    restart: unless-stopped
-
 networks:
   control:
     name: creatorhub_control