fix update build

Dockerfile

@@ -1,11 +1,17 @@
-FROM nginx:alpine
+FROM node:20-alpine
 
-# Copy custom nginx config
-COPY nginx.conf /etc/nginx/nginx.conf
+WORKDIR /app
 
-# Copy the static export to nginx html directory
-COPY build /usr/share/nginx/html
+# Next.js standalone runtime. Required because the contact form's Server
+# Action (sendEmail.ts, SMTP via nodemailer) needs a live Node process -
+# it cannot run under static/nginx serving.
+ENV NODE_ENV=production
+ENV PORT=3000
+ENV HOSTNAME=0.0.0.0
 
-EXPOSE 80
+# Copy the standalone build artifact (server.js, .next/, public/)
+COPY build /app
 
-CMD ["nginx", "-g", "daemon off;"]
+EXPOSE 3000
+
+CMD ["node", "server.js"]