Add Dockerfile and CI workflow

.github/workflows/docker-ci.yml

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+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+          cache: 'pip'
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip setuptools
+          pip install poetry
+          poetry config virtualenvs.create false
+          if [ -f poetry.lock ]; then poetry install --no-dev; else pip install .; fi
+          pip install flake8 mypy
+
+      - name: Lint with flake8
+        run: flake8 .
+
+      - name: Static analysis with mypy
+        run: mypy .
+
+      - name: Run tests
+        run: |
+          pip install pytest
+          pytest -q
+
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build Docker image
+        run: |
+          IMAGE_TAG=ghcr.io/${{ github.repository_owner }}/${{ github.repository_name }}:$(git rev-parse --short HEAD)
+          docker build -t $IMAGE_TAG .
+
+      - name: Push Docker image
+        if: success()
+        run: |
+          IMAGE_TAG=ghcr.io/${{ github.repository_owner }}/${{ github.repository_name }}:$(git rev-parse --short HEAD)
+          docker push $IMAGE_TAG

Dockerfile

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+# Dockerfile for MCP server
+# Uses Python 3.12 slim image, installs the application and its dependencies
+
+FROM python:3.12-slim AS base
+
+# Install system dependencies (if any)
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    gcc \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create a non-root user
+ARG USERNAME=appuser
+ARG UID=1000
+RUN adduser --uid ${UID} --disabled-password --gecos "" ${USERNAME}
+
+# Set working directory
+WORKDIR /app
+
+# Copy only requirements first for caching layers
+COPY pyproject.toml poetry.lock* /app/ || true
+
+# Install poetry (or pip) and dependencies
+RUN pip install --upgrade pip setuptools && \
+    pip install poetry && \
+    poetry config virtualenvs.create false && \
+    if [ -f poetry.lock ]; then poetry install --no-dev; else pip install .; fi
+
+# Copy the rest of the source code
+COPY . /app
+
+# Switch to non-root user
+USER ${USERNAME}
+
+# Expose the service port (adjust if needed)
+EXPOSE 8000
+
+# Default command – run the FastAPI server (adjust entrypoint as needed)
+CMD ["uvicorn", "mcp_server.main:app", "--host", "0.0.0.0", "--port", "8000"]