fix(infra) : hardcode prod port 8086 like other apps

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

infra/prod/.env.prod.example

@@ -6,8 +6,6 @@ POSTGRES_DB=coltura
 POSTGRES_USER=coltura
 POSTGRES_PASSWORD=CHANGE_ME_IN_PRODUCTION
 
-APP_PORT=80
-
 JWT_PASSPHRASE=CHANGE_ME_IN_PRODUCTION
 JWT_COOKIE_SECURE=1
 JWT_TOKEN_TTL=86400

infra/prod/docker-compose.prod.yml

@@ -3,7 +3,7 @@ services:
     container_name: php-coltura-fpm
     build:
       context: ../../
-      dockerfile: infra/deploy/Dockerfile
+      dockerfile: infra/prod/Dockerfile
       target: php-base
     environment:
       APP_ENV: prod
@@ -19,12 +19,12 @@ services:
     container_name: nginx-coltura
     build:
       context: ../../
-      dockerfile: infra/deploy/Dockerfile
+      dockerfile: infra/prod/Dockerfile
       target: nginx
     depends_on:
       - php
     ports:
-      - "${APP_PORT:-80}:80"
+      - "8086:80"
     restart: unless-stopped
 
   db: