feat: Add Docker infrastructure and Gitea CI/CD pipeline

- Add Dockerfiles for server, client, and admin services
- Create docker-compose.yml for orchestration
- Add Gitea Actions workflow for automated build/deploy
- Configure conditional builds based on directory changes
- Use gitea.interno.com registry for image storage

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.gitea/workflows/build-and-deploy.yml

@@ -0,0 +1,79 @@
+name: build-and-deploy
+
+on:
+  push:
+    branches: [ master ]
+
+jobs:
+#───────────────── filtra qué dirs cambiaron ─────────────────
+  filter:
+    runs-on: docker
+    outputs:
+      server: ${{ steps.paths.outputs.server }}
+      client: ${{ steps.paths.outputs.client }}
+      admin:  ${{ steps.paths.outputs.admin }}
+    steps:
+      - uses: actions/checkout@v3
+      - id: paths
+        uses: dorny/paths-filter@v3
+        with:
+          filters: |
+            server: "server/**"
+            client: "client/**"
+            admin:  "admin/**"
+
+#───────────────── build & push ─────────────────
+  build:
+    needs: filter
+    runs-on: docker
+    env:
+      REG: gitea.interno.com/nucleo000
+    steps:
+      - uses: actions/checkout@v3
+      - uses: docker/setup-buildx-action@v2
+      - uses: docker/login-action@v2
+        with:
+          registry: gitea.interno.com
+          username: nucleo000           # ⬅ ponelo en secrets
+          password: 7bc7b2fcd283bd6a251bef3ede368b7f897c919d # ⬅ idem
+
+      - name: Build+push server
+        if: needs.filter.outputs.server == 'true'
+        run: |
+          docker build -f server/Dockerfile -t $REG/snatchgame-server:${{ github.sha }} -t $REG/snatchgame-server:latest server
+          docker push $REG/snatchgame-server:${{ github.sha }}
+          docker push $REG/snatchgame-server:latest
+
+      - name: Build+push client
+        if: needs.filter.outputs.client == 'true'
+        run: |
+          docker build -f client/Dockerfile -t $REG/snatchgame-client:${{ github.sha }} -t $REG/snatchgame-client:latest client
+          docker push $REG/snatchgame-client:${{ github.sha }}
+          docker push $REG/snatchgame-client:latest
+
+      - name: Build+push admin
+        if: needs.filter.outputs.admin == 'true'
+        run: |
+          docker build -f admin/Dockerfile -t $REG/snatchgame-admin:${{ github.sha }} -t $REG/snatchgame-admin:latest admin
+          docker push $REG/snatchgame-admin:${{ github.sha }}
+          docker push $REG/snatchgame-admin:latest
+
+#───────────────── deploy ─────────────────
+  deploy:
+    needs: build
+    runs-on: docker
+    env:
+      REG: gitea.interno.com/nucleo000
+    steps:
+      - uses: actions/checkout@v3
+      - name: Login to registry
+        run: docker login gitea.interno.com -u nucleo000 -p 7bc7b2fcd283bd6a251bef3ede368b7f897c919d
+
+      - name: Pull fresh images used in compose
+        run: docker compose pull
+
+      - name: Clean up stack
+        run: docker compose --project-name snatchgame down
+
+      - name: Update stack
+        run: docker compose --project-name snatchgame up -d --remove-orphans --wait