Added PORT from env

Author: rofrano

wsgi.py

@@ -1,9 +1,13 @@
 """
 Web Server Gateway Interface (WSGI) entry point
 """
+
+import os
 from service import create_app
 
+PORT = int(os.getenv("PORT", "8000"))
+
 app = create_app()
 
 if __name__ == "__main__":
-    app.run(host='0.0.0.0')
+    app.run(host="0.0.0.0", port=PORT)