Improve database migration and application startup processes

Update Dockerfile to generate database migrations, compile a migration script, and adjust the CMD for application startup. Modify docker-compose.yml to comment out PostgreSQL port exposure for security and update the command to run the new migration script. Add dependencies and a new migration script (server/migrate.ts) to handle database schema changes. Update INSTALLATION.md to reflect changes in database access and security recommendations.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ae4037a0-2a6f-4530-9bac-79b543286bda
Replit-Commit-Checkpoint-Type: intermediate_checkpoint
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docker-compose.yml

@@ -12,8 +12,10 @@ services:
       POSTGRES_PASSWORD: ${PGPASSWORD:-changeme}
     volumes:
       - postgres_data:/var/lib/postgresql/data
-    ports:
-      - "${PGPORT:-5432}:5432"
+    # Port non exposé sur l'hôte pour plus de sécurité en production
+    # Décommentez la ligne suivante si vous avez besoin d'accéder à la DB localement
+    # ports:
+    #   - "${PGPORT:-5432}:5432"
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U ${PGUSER:-socialflow}"]
       interval: 10s
@@ -41,7 +43,7 @@ services:
     depends_on:
       postgres:
         condition: service_healthy
-    command: sh -c "npm run db:push && node dist/server.js"
+    command: sh -c "node dist/migrate.js && npm run start"
 
 volumes:
   postgres_data: