infra: change host port from 3000 to 3847

Port 3000 is already in use on the server.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker-compose.prod.yml

@@ -18,7 +18,7 @@ services:
     image: code.letsbe.solutions/letsbe/letsbebiz-site:latest
     restart: unless-stopped
     ports:
-      - "127.0.0.1:3000:3000"
+      - "127.0.0.1:3847:3000"
     environment:
       DATABASE_URI: postgresql://${POSTGRES_USER:-letsbe}:${POSTGRES_PASSWORD}@db:5432/letsbe
       PAYLOAD_SECRET: ${PAYLOAD_SECRET}

nginx/staging.letsbe.biz.conf

@@ -6,7 +6,7 @@ server {
     # Certbot will add SSL config after: sudo certbot --nginx -d staging.letsbe.biz
 
     location / {
-        proxy_pass http://127.0.0.1:3000;
+        proxy_pass http://127.0.0.1:3847;
         proxy_http_version 1.1;
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection 'upgrade';
@@ -20,21 +20,21 @@ server {
 
     # Static assets — long cache
     location /_next/static/ {
-        proxy_pass http://127.0.0.1:3000;
+        proxy_pass http://127.0.0.1:3847;
         proxy_cache_valid 200 365d;
         add_header Cache-Control "public, max-age=31536000, immutable";
     }
 
     # Public assets
     location /images/ {
-        proxy_pass http://127.0.0.1:3000;
+        proxy_pass http://127.0.0.1:3847;
         proxy_cache_valid 200 30d;
         add_header Cache-Control "public, max-age=2592000";
     }
 
     # Payload media uploads
     location /media/ {
-        proxy_pass http://127.0.0.1:3000;
+        proxy_pass http://127.0.0.1:3847;
         proxy_cache_valid 200 30d;
         add_header Cache-Control "public, max-age=2592000";
     }