Add dockerfile

Caddyfile

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+# global options
+{
+    admin off # theres no need for the admin api in railway's environment
+    persist_config off # storage isn't persistent anyway
+    auto_https off # railway handles https for us, this would cause issues if left enabled
+    log { # runtime logs
+        format console # set runtime log format to console mode
+    }
+}
+
+:3000 {
+    log { # access logs
+        format console # set access log format to console mode
+    }
+
+    # health check for railway
+    respond /health 200
+
+    # serve from the 'dist' folder (Vite builds into the 'dist' folder)
+    root * /app/dist
+
+    # enable gzipping responses
+    encode gzip
+
+    # serve files from 'dist'
+    file_server
+
+    # if path doesn't exist, redirect it to 'index.html' for client side routing
+    try_files {path} /index.html
+}