making port configurable

Dockerfile

@@ -52,7 +52,6 @@ COPY --from=builder /app/node_modules/next/dist/compiled/jest-worker ./node_modu
 USER nextjs
 
 EXPOSE 3000
-EXPOSE 587
 
 ENV PORT 3000
 ENV HOSTNAME "0.0.0.0"

src/app/(main)/contact-us/page.jsx

@@ -23,7 +23,7 @@ export default async function Page({ searchParams }) {
   if (valid && validHostName) {
     const transporter = nodemailer.createTransport({
       host: process.env.CONTACT_HOST,
-      port: 587,
+      port: process.env.CONTACT_PORT,
       secure: false, // true for 465, false for other ports
       auth: {
         user: process.env.CONTACT_USER,