Add support of ExtraHosts for Docker, Ref. gns3-gui#2482

gns3server/handlers/api/compute/docker_handler.py

@@ -60,7 +60,8 @@ class DockerHandler:
                                                           console_resolution=request.json.get("console_resolution", "1024x768"),
                                                           console_http_port=request.json.get("console_http_port", 80),
                                                           console_http_path=request.json.get("console_http_path", "/"),
-                                                          aux=request.json.get("aux"))
+                                                          aux=request.json.get("aux"),
+                                                          extra_hosts=request.json.get("extra_hosts"))
         for name, value in request.json.items():
             if name != "node_id":
                 if hasattr(container, name) and getattr(container, name) != value:
@@ -312,7 +313,7 @@ class DockerHandler:
         props = [
             "name", "console", "aux", "console_type", "console_resolution",
             "console_http_port", "console_http_path", "start_command",
-            "environment", "adapters"
+            "environment", "adapters", "extra_hosts"
         ]
 
         changed = False