feat: add single-port reverse proxy deployment support

deploy/Caddyfile

@@ -0,0 +1,15 @@
+:80 {
+  encode zstd gzip
+
+  header {
+    X-Content-Type-Options "nosniff"
+    X-Frame-Options "SAMEORIGIN"
+    Referrer-Policy "strict-origin-when-cross-origin"
+  }
+
+  reverse_proxy app:5050 {
+    header_up X-Forwarded-Proto {scheme}
+    header_up X-Forwarded-Host {host}
+    header_up X-Forwarded-For {remote_host}
+  }
+}