start websockify once with gunicorn config

gunicorn_conf.py

@@ -0,0 +1,29 @@
+import os
+import subprocess
+from flask import Flask
+
+app = Flask(__name__)
+if os.path.exists(
+        os.path.join(
+            app.config.get('ROOT_DIR', os.getcwd()), "config.local.py")):
+    config = os.path.join(
+        app.config.get('ROOT_DIR', os.getcwd()), "config.local.py")
+else:
+    config = os.path.join(app.config.get('ROOT_DIR', os.getcwd()), "config.py")
+app.config.from_pyfile(config)
+
+
+def start_websockify(websockify_path, target_file):
+    result = subprocess.run(['pgrep', 'websockify'], stdout=subprocess.PIPE)
+    if not result.stdout:
+        subprocess.call(
+            [
+                websockify_path, '8081', '--token-plugin', 'TokenFile',
+                '--token-source', target_file, '-D'
+            ],
+            stdout=subprocess.PIPE)
+
+
+def on_starting(server):
+    start_websockify(app.config['WEBSOCKIFY_PATH'],
+                     app.config['WEBSOCKIFY_TARGET_FILE'])