fix: use Railway PORT env var for nginx

railway/nginx.conf.template

@@ -2,7 +2,7 @@
 # Frontend static files + API proxy to backend
 
 server {
-    listen 8080;
+    listen ${PORT};
     server_name _;
 
     root /usr/share/nginx/html;

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;"

railway/supervisord.conf

@@ -16,7 +16,7 @@ stderr_logfile_maxbytes=0
 environment=API_SERVER_PORT="8081",DB_PATH="/app/data/data.db"
 
 [program:nginx]
-command=nginx -g "daemon off;"
+command=/app/start-nginx.sh
 autostart=true
 autorestart=true
 stdout_logfile=/dev/stdout