Implement shutdown and reboot via API; add Makefile for deployment

src/lightbar/app.py

@@ -0,0 +1,22 @@
+import machine
+import uasyncio
+from microdot_asyncio import Microdot
+
+from lightbar.frontend import frontend
+from lightbar.rest_api import rest_api
+
+
+class Lightbar(Microdot):
+    def __init__(self):
+        super().__init__()
+        self.mount(frontend)
+        self.mount(rest_api, url_prefix='/api')
+
+    async def scheduled_shutdown(self):
+        await uasyncio.sleep(0.1)
+        self.shutdown()
+
+    @staticmethod
+    async def scheduled_reboot():
+        await uasyncio.sleep(0.1)
+        machine.reset()