feat: add initial Docker Compose infrastructure

infra/docker/compose.yml

@@ -0,0 +1,77 @@
+services:
+  backend:
+    build:
+      context: ./backend
+    image: azionelab-backend:local
+    environment:
+      DJANGO_SECRET_KEY: ${DJANGO_SECRET_KEY}
+      DJANGO_ALLOWED_HOSTS: ${DJANGO_ALLOWED_HOSTS}
+      DJANGO_CSRF_TRUSTED_ORIGINS: ${DJANGO_CSRF_TRUSTED_ORIGINS}
+      DJANGO_DEBUG: ${DJANGO_DEBUG:-false}
+      DATABASE_URL: ${DATABASE_URL}
+      POSTGRES_DB: ${POSTGRES_DB}
+      POSTGRES_USER: ${POSTGRES_USER}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_HOST: ${POSTGRES_HOST:-postgres}
+      POSTGRES_PORT: ${POSTGRES_PORT:-5432}
+    expose:
+      - "${BACKEND_PORT:-8000}"
+    depends_on:
+      postgres:
+        condition: service_healthy
+    networks:
+      - internal
+    restart: unless-stopped
+
+  frontend:
+    build:
+      context: ./frontend
+    image: azionelab-frontend:local
+    expose:
+      - "${FRONTEND_PORT:-8080}"
+    networks:
+      - internal
+    restart: unless-stopped
+
+  postgres:
+    image: postgres:16.3-alpine
+    environment:
+      POSTGRES_DB: ${POSTGRES_DB}
+      POSTGRES_USER: ${POSTGRES_USER}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U \"$${POSTGRES_USER}\" -d \"$${POSTGRES_DB}\""]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+    networks:
+      - internal
+    restart: unless-stopped
+
+  nginx:
+    image: nginx:1.27.0-alpine
+    ports:
+      - "${NGINX_HTTP_PORT:-8080}:80"
+    environment:
+      BACKEND_HOST: ${BACKEND_HOST:-backend}
+      BACKEND_PORT: ${BACKEND_PORT:-8000}
+      FRONTEND_HOST: ${FRONTEND_HOST:-frontend}
+      FRONTEND_PORT: ${FRONTEND_PORT:-8080}
+      NGINX_ENVSUBST_FILTER: "^(BACKEND_HOST|BACKEND_PORT|FRONTEND_HOST|FRONTEND_PORT)$"
+    volumes:
+      - ./nginx/templates:/etc/nginx/templates:ro
+    depends_on:
+      - backend
+      - frontend
+    networks:
+      - internal
+    restart: unless-stopped
+
+volumes:
+  postgres_data:
+
+networks:
+  internal:
+    driver: bridge