add docker

Dockerfile

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+FROM node:22-alpine
+
+# Set working directory
+WORKDIR /app
+
+# Copy package files
+COPY package*.json ./
+
+# Install ALL dependencies (including devDependencies for build)
+RUN npm ci
+
+# Copy source code
+COPY . .
+
+# Build TypeScript
+RUN npm run build
+
+# Remove devDependencies after build to reduce image size
+RUN npm prune --production
+
+# Create a non-root user for security
+RUN addgroup -g 1001 -S nodejs && \
+    adduser -S nodejs -u 1001
+
+# Change ownership
+RUN chown -R nodejs:nodejs /app
+
+# Switch to non-root user
+USER nodejs
+
+# Expose port
+EXPOSE 8080
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
+  CMD wget --quiet --tries=1 --spider http://localhost:8080/health || exit 1
+
+# Start the application
+CMD ["node", "dist/index.js"]