fix: Align nginx backend port for production Docker deployments (v2.2.2) (#88)

Fix 502 Bad Gateway on root path in production Docker/Traefik deployments.

  - nginx.conf: backend:3001 → backend:3000 (matches production container port)
  - docker-compose.yml: align dev environment to use port 3000
  - Bump version to 2.2.2

backend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "picpeak-backend",
-  "version": "2.2.1",
+  "version": "2.2.2",
   "description": "Backend for PicPeak event photo sharing platform",
   "main": "server.js",
   "scripts": {

docker-compose.yml

@@ -7,7 +7,7 @@ services:
     restart: unless-stopped
     environment:
       - NODE_ENV=${NODE_ENV:-production}
-      - PORT=3001
+      - PORT=3000
       - JWT_SECRET=${JWT_SECRET}
       - ADMIN_USERNAME=${ADMIN_USERNAME:-admin}
       - ADMIN_EMAIL=${ADMIN_EMAIL:-admin@example.com}
@@ -43,12 +43,12 @@ services:
       - ./backup:/backup
       - ./storage:/app/storage
     ports:
-      - "${BACKEND_PORT:-3001}:3001"
+      - "${BACKEND_PORT:-3001}:3000"
     depends_on:
       postgres:
         condition: service_healthy
     healthcheck:
-      test: ["CMD", "wget", "--quiet", "--tries=1", "--spider", "http://127.0.0.1:3001/health"]
+      test: ["CMD", "wget", "--quiet", "--tries=1", "--spider", "http://127.0.0.1:3000/health"]
       interval: 30s
       timeout: 10s
       retries: 3

frontend/nginx.conf

@@ -43,7 +43,7 @@ server {
 
     # API proxy
     location /api {
-        proxy_pass http://backend:3001;
+        proxy_pass http://backend:3000;
         proxy_http_version 1.1;
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection 'upgrade';
@@ -61,7 +61,7 @@ server {
 
     # Photo serving proxy
     location /photos {
-        proxy_pass http://backend:3001;
+        proxy_pass http://backend:3000;
         proxy_http_version 1.1;
         proxy_set_header Host $host;
         proxy_set_header X-Real-IP $remote_addr;
@@ -75,7 +75,7 @@ server {
 
     # Thumbnail serving proxy
     location /thumbnails {
-        proxy_pass http://backend:3001;
+        proxy_pass http://backend:3000;
         proxy_http_version 1.1;
         proxy_set_header Host $host;
         proxy_set_header X-Real-IP $remote_addr;
@@ -90,7 +90,7 @@ server {
     # Uploads serving proxy (logos, favicons, watermarks)
     # ^~ modifier stops regex matching, ensuring uploads are proxied not served locally
     location ^~ /uploads {
-        proxy_pass http://backend:3001;
+        proxy_pass http://backend:3000;
         proxy_http_version 1.1;
         proxy_set_header Host $host;
         proxy_set_header X-Real-IP $remote_addr;
@@ -104,7 +104,7 @@ server {
 
     # Delegate root requests to backend for public landing page handling
     location = / {
-        proxy_pass http://backend:3001/;
+        proxy_pass http://backend:3000/;
         proxy_http_version 1.1;
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection 'upgrade';

frontend/package.json

@@ -1,7 +1,7 @@
 {
   "name": "picpeak-frontend",
   "private": true,
-  "version": "2.2.1",
+  "version": "2.2.2",
   "type": "module",
   "scripts": {
     "dev": "vite",