Add firmware update button and update endpoint

webserver.py

@@ -2,6 +2,7 @@ import json
 import gc
 import time
 import uasyncio as asyncio
+#import update
 
 # Import config value
 from config import TANK_CAPACITY_L, VERSION
@@ -68,6 +69,25 @@ class WebServer:
                     json.dumps({"ok": True}).encode()
                 )
 
+            # ---------- UPDATE ----------
+            elif path == "/update":
+
+                writer.write(
+                    b"HTTP/1.1 200 OK\r\n"
+                    b"Content-Type: application/json\r\n\r\n" +
+                    json.dumps({
+                        "ok": True,
+                        "message": "Starting update"
+                    }).encode()
+                )
+
+                await writer.drain()
+
+                import update
+
+#             # ---------- JAVASCRIPT ----------
+#             elif path == "/app.js":
+
             # ---------- JAVASCRIPT (CONFIG INJECTED) ----------
             elif path == "/app.js":
                 with open("/html/app.js") as f: