fix(docker): make host ports configurable via WEB_PORT and DB_PORT

.env.example

@@ -8,7 +8,9 @@ POSTGRES_PASSWORD=replace_with_a_secure_password
 POSTGRES_DB=jobsboard
 DATABASE_URL=postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@db:5432/${POSTGRES_DB}?schema=public
 
-# Application URLs & Authentication
+# Application URLs, Ports & Authentication
+WEB_PORT=3000
+DB_PORT=5432
 NEXTAUTH_SECRET=replace_with_a_random_32_char_secret_string
 NEXTAUTH_URL=http://localhost:3000
 NODE_ENV=production

docker-compose.yml

@@ -10,7 +10,7 @@ services:
       POSTGRES_PASSWORD: postgres
       POSTGRES_DB: jobsboard
     ports:
-      - "5432:5432"
+      - "${DB_PORT:-5432}:5432"
     volumes:
       - postgres_data:/var/lib/postgresql/data
     healthcheck:
@@ -26,11 +26,11 @@ services:
     container_name: jobsboard_web
     restart: always
     ports:
-      - "3000:3000"
+      - "${WEB_PORT:-3000}:3000"
     environment:
       DATABASE_URL: "postgresql://postgres:postgres@db:5432/jobsboard?schema=public"
-      NEXTAUTH_SECRET: "jobsboard-secret-key-for-auth-sessions"
-      NEXTAUTH_URL: "http://localhost:3000"
+      NEXTAUTH_SECRET: "${NEXTAUTH_SECRET:-jobsboard-secret-key-for-auth-sessions}"
+      NEXTAUTH_URL: "${NEXTAUTH_URL:-http://localhost:3000}"
       NODE_ENV: "production"
     depends_on:
       db: