refactor: backend port 8000 → 7000 pour eviter conflits applicatifs

- Dockerfile: EXPOSE + CMD uvicorn --port 7000
- app/config.py: PORT default 8000 → 7000
- nginx default.conf: 6x proxy_pass backend:8000 → backend:7000
- docker-compose.prod.yml: BACKEND_PORT default 8001 → 7000, internal 7000
- docker-compose.yml (dev): 8000:8000 → 7000:7000
- imago-admin/docker-compose.yml: VITE_API_BASE_URL + port mapping → 7000
- .env.example: BACKEND_PORT=8001 → 7000
- deploy.sh: defaults + invites port 8001 → 7000

scripts/deploy.sh

@@ -84,7 +84,7 @@ configure_env() {
     echo -e "${BOLD}── Application ──${NC}"
     ask "Nom de l'application [Imago]:"; read -r APP_NAME; APP_NAME="${APP_NAME:-Imago}"
     ask "Port admin UI [3001]:"; read -r ADMIN_PORT; ADMIN_PORT="${ADMIN_PORT:-3001}"
-    ask "Port API backend [8001]:"; read -r BACKEND_PORT; BACKEND_PORT="${BACKEND_PORT:-8001}"
+    ask "Port API backend [7000]:"; read -r BACKEND_PORT; BACKEND_PORT="${BACKEND_PORT:-7000}"
     echo ""
 
     # ── Section 2 : Stockage ───────────────────────────────
@@ -409,7 +409,7 @@ show_urls() {
     done < "$ENV_FILE"
     fi
     local admin_port="${ADMIN_PORT:-3001}"
-    local backend_port="${BACKEND_PORT:-8001}"
+    local backend_port="${BACKEND_PORT:-7000}"
 
     echo ""
     echo -e "${BOLD}${GREEN}╔══════════════════════════════════════════════════════════════╗${NC}"