add gateway automatic template and fefan vm

modules/apps/gateway/lib/scripts/pull-webhook.py

@@ -0,0 +1,23 @@
+from flask import Flask, request, abort
+import subprocess
+import os
+
+SECRET = os.environ.get("WEBHOOK_SECRET")
+REPOSITORY = os.environ.get("GATEWAY_REPOSITORY_LOCATION")
+
+app = Flask(__name__)
+
+@app.route("/reload", methods=["POST"])
+def reload():
+    token = request.headers.get("X-Webhook-Token")
+    if token != SECRET:
+        abort(403)
+
+    subprocess.run(
+        ["git", "-C", REPOSITORY, "pull"],
+        check=True
+    )
+    return "ok\n"
+
+if __name__ == "__main__":
+    app.run()