Add Dockerfile for MCP registry support

This Dockerfile enables the chrome-devtools-mcp server to be used
with Docker-based MCP registries. It:
- Uses Node.js 22 LTS with Chrome dependencies
- Installs Chrome Stable for Puppeteer
- Builds the TypeScript project
- Runs as non-root user for security
- Exposes the MCP server via stdio

Author: kgprs

Dockerfile

@@ -0,0 +1,65 @@
+# Build stage
+FROM node:22-bookworm-slim AS builder
+
+WORKDIR /app
+
+# Copy all source files
+COPY . .
+
+# Install all dependencies (including dev dependencies for building)
+RUN npm ci
+
+# Build the TypeScript project
+RUN npm run build
+
+# Runtime stage
+FROM node:22-bookworm-slim
+
+# Install Chromium and dependencies
+RUN apt-get update && apt-get install -y \
+    chromium \
+    fonts-liberation \
+    libasound2 \
+    libatk-bridge2.0-0 \
+    libatk1.0-0 \
+    libatspi2.0-0 \
+    libcups2 \
+    libdbus-1-3 \
+    libdrm2 \
+    libgbm1 \
+    libgtk-3-0 \
+    libnspr4 \
+    libnss3 \
+    libwayland-client0 \
+    libxcomposite1 \
+    libxdamage1 \
+    libxfixes3 \
+    libxkbcommon0 \
+    libxrandr2 \
+    xdg-utils \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+# Copy package files
+COPY package*.json ./
+
+# Install only production dependencies, skip prepare script
+RUN npm ci --omit=dev --ignore-scripts
+
+# Copy built files from builder stage
+COPY --from=builder /app/build ./build
+
+# Set environment to tell Puppeteer where Chromium is installed
+ENV PUPPETEER_EXECUTABLE_PATH=/usr/bin/chromium
+
+# Run as non-root user for security
+RUN groupadd -r mcpuser && useradd -r -g mcpuser -G audio,video mcpuser \
+    && mkdir -p /home/mcpuser/Downloads \
+    && chown -R mcpuser:mcpuser /home/mcpuser \
+    && chown -R mcpuser:mcpuser /app
+
+USER mcpuser
+
+# Expose MCP server via stdio
+ENTRYPOINT ["node", "build/src/index.js"]