Add Docker deployment and CI/CD pipeline

.dockerignore

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+# .dockerignore
+
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+*.egg-info/
+dist/
+build/
+.venv/
+venv/
+.env
+
+# Node
+node_modules/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+.DS_Store
+
+# Git
+.git/
+.gitignore
+
+# Logs
+logs/
+*.log
+
+# Runtime
+audio/
+transcript.txt
+dialogue.html
+
+# Docker
+Dockerfile*
+docker-compose*.yml
+.dockerignore
+
+# CI/CD
+.github/

.github/workflows/ci.yml

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+name: CI/CD Pipeline
+
+on:
+  push:
+    branches: [ main, develop ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  lint-and-test:
+    name: Lint & Test
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+
+      - name: Install Python dependencies
+        run: |
+          pip install --upgrade pip
+          pip install ruff black isort
+          pip install -r requirements.txt
+
+      - name: Lint Python code (Ruff)
+        run: ruff check . --fix
+        continue-on-error: true
+
+      - name: Format Python code (Black)
+        run: black --check .
+        continue-on-error: true
+
+      - name: Check import sorting (isort)
+        run: isort --check-only .
+        continue-on-error: true
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+
+      - name: Install frontend dependencies
+        working-directory: ./frontend
+        run: npm ci
+
+      - name: Lint frontend code (ESLint)
+        working-directory: ./frontend
+        run: npm run lint
+        continue-on-error: true
+
+      - name: Type check frontend (TypeScript)
+        working-directory: ./frontend
+        run: npx tsc --noEmit
+        continue-on-error: true
+
+  build-backend:
+    name: Build Backend Docker Image
+    runs-on: ubuntu-latest
+    needs: lint-and-test
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build backend image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: ./Dockerfile.backend
+          push: false
+          tags: ai-stream-backend:latest
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+  build-frontend:
+    name: Build Frontend Docker Image
+    runs-on: ubuntu-latest
+    needs: lint-and-test
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build frontend image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: ./Dockerfile.frontend
+          push: false
+          tags: ai-stream-frontend:latest
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+  docker-compose-test:
+    name: Test Docker Compose
+    runs-on: ubuntu-latest
+    needs: [build-backend, build-frontend]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Create .env file
+        run: |
+          echo "GROQ_API_KEY=test_key" >> .env
+          echo "ELEVENLABS_API_KEY=test_key" >> .env
+
+      - name: Build services
+        run: docker compose build
+
+      - name: Start services
+        run: docker compose up -d
+
+      - name: Wait for services to be healthy
+        run: |
+          timeout 60 bash -c 'until docker compose ps | grep healthy; do sleep 2; done'
+
+      - name: Test backend health
+        run: |
+          curl -f http://localhost:8000/health || exit 1
+
+      - name: Test frontend
+        run: |
+          curl -f http://localhost:80 || exit 1
+
+      - name: Stop services
+        run: docker compose down

.isort.cfg

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+[settings]
+profile = black
+line_length = 100
+multi_line_output = 3
+include_trailing_comma = True
+force_grid_wrap = 0
+use_parentheses = True
+ensure_newline_before_comments = True

.ruff.toml

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+line-length = 100
+target-version = "py312"
+
+[lint]
+select = ["E", "F", "I", "N", "W"]
+ignore = ["E501"]  # Line too long (handled by black)
+
+[lint.per-file-ignores]
+"__init__.py" = ["F401"]  # Unused imports in __init__.py