Change main.py to app.py. Maybe Gunicorn will like us now.

app.py

@@ -0,0 +1,33 @@
+from flask import Flask, render_template, jsonify
+import threading
+import time
+
+app = Flask(__name__)
+current_state = "red"
+lock = threading.Lock()
+
+def reset_to_red():
+    global current_state
+    time.sleep(10)
+    with lock:
+        current_state = "red"
+
+@app.route("/")
+def index():
+    return render_template("site_template.j2", state=current_state)
+
+@app.route("/status")
+def status():
+    return jsonify({"state": current_state})
+
+@app.route("/toggle", methods=["POST"])
+def toggle():
+    global current_state
+    with lock:
+        if current_state != "green":
+            current_state = "green"
+            threading.Thread(target=reset_to_red, daemon=True).start()
+    return jsonify({"state": current_state})
+
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=8000)