add caddy

Caddyfile

@@ -0,0 +1,16 @@
+http://:{$PORT} {
+    root * /root/html
+    file_server
+    reverse_proxy /h2 127.0.0.1:8082 {
+        transport http {
+            versions h2c
+        }
+    }
+    @websockets {
+        header Connection *Upgrade*
+        header Upgrade websocket
+    }
+    reverse_proxy @websockets localhost:8080
+
+
+}