Add skeleton flask app

Author: GuLinux

.gitignore

@@ -6,3 +6,5 @@ logs
 data/wifi.json
 extra_envs.ini
 web/.env.*.local
+__pycache__
+

sbc-backend/app.py

@@ -0,0 +1,12 @@
+#!/usr/bin/env python3
+from flask import Flask
+
+app = Flask(__name__)
+
+@app.route("/")
+def hello_world():
+    return "<p>Hello, World!</p>"
+
+
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=5000, debug=True)