fix(09): improve Caddy WebSocket support for Next.js HMR

.standalone.pid

@@ -1,3 +1,3 @@
-834000
-834001
-834015
+834658
+834659
+834673

Caddyfile.standalone

@@ -17,7 +17,15 @@ https://:8919 {
     }
 
     # Next.js HMR Support (WebSocket)
-        header_up X-Forwarded-For {remote_host}
+    handle /_next/webpack-hmr {
+        reverse_proxy http://localhost:8917 {
+            header_up Upgrade {>Upgrade}
+            header_up Connection {>Connection}
+        }
+    }
+
+    reverse_proxy http://localhost:8917 {
+        header_up X-Forwarded-For {remote_host}
         header_up X-Forwarded-Proto https
         header_up X-Forwarded-Host {host}
     }
@@ -37,7 +45,7 @@ https://:8918 {
     }
 
     reverse_proxy http://localhost:8916 {
-        header_up X-Forwarded-For {remote_host}
+        header_up X-Forwarded-For {remote_host}
         header_up X-Forwarded-Proto https
         header_up X-Forwarded-Host {host}
     }