ops(ci): fix docker-build job — setup .env BEFORE compose build

- cp .env.example .env en step 1 (compose interpole les vars au build)
- Add `compose config` validation step
- Bump sleep 30 -> 60s (Docmost boot prend 45-60s sur runner)
- Bump logs --tail=200 (200 lignes au lieu de tout)

.github/workflows/ci.yml

@@ -128,19 +128,21 @@ jobs:
     needs: [test-bridge-unit, test-bridge-integration, security-scan]
     steps:
       - uses: actions/checkout@v4
+      - name: Setup .env (avant compose pour interpolation)
+        run: cp .env.example .env
+      - name: Validate compose config
+        run: docker compose config > /dev/null
       - name: Build images
         run: docker compose build
       - name: Up stack
-        run: |
-          cp .env.example .env
-          docker compose up -d
-      - name: Wait for services
-        run: sleep 30
+        run: docker compose up -d
+      - name: Wait for services (60s — Docmost boot lent)
+        run: sleep 60
       - name: Healthcheck
         run: ./scripts/healthcheck.sh
       - name: Logs on failure
         if: failure()
-        run: docker compose logs
+        run: docker compose logs --tail=200
       - name: Cleanup
         if: always()
         run: docker compose down -v