feat: add Dockerfile and docker-compose.yml for containerized deployment

docker-compose.yml

@@ -0,0 +1,30 @@
+version: "3.8"
+services:
+  app:
+    build: .
+    ports:
+      - "3000:3000"
+    environment:
+      - DATABASE_URL=postgresql://postgres:postgres@db:5432/comparaison
+    depends_on:
+      db:
+        condition: service_healthy
+    restart: unless-stopped
+  db:
+    image: postgres:16-alpine
+    environment:
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+      POSTGRES_DB: comparaison
+    ports:
+      - "5432:5432"
+    volumes:
+      - pgdata:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U postgres"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+    restart: unless-stopped
+volumes:
+  pgdata: