fix: use Railway PORT env var for nginx

railway/start-nginx.sh

@@ -0,0 +1,13 @@
+#!/bin/sh
+# Nginx startup wrapper - substitutes PORT environment variable
+
+# Default PORT to 8080 if not set
+export PORT=${PORT:-8080}
+
+echo "🌐 Starting nginx on port $PORT..."
+
+# Generate nginx config from template
+envsubst '${PORT}' < /etc/nginx/nginx.conf.template > /etc/nginx/http.d/default.conf
+
+# Start nginx
+exec nginx -g "daemon off;"