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Dockerfile

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+# Use official Deno runtime as base image
+ARG DENO_VERSION=2.6.4
+FROM denoland/deno:${DENO_VERSION}
+
+# Set working directory
+WORKDIR /app
+
+# Copy dependency manifest first (better layer caching)
+COPY deno.json deno.lock ./
+
+# Copy source code
+COPY src/ ./src/
+
+# Cache dependencies by checking the main file
+# This downloads and caches all imports
+RUN deno cache src/main.ts
+
+# Expose port (default: 8000)
+EXPOSE 8000
+
+# Create non-root user for security
+RUN useradd -m -u 1001 denouser && \
+    chown -R denouser:denouser /app
+
+USER denouser
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD deno eval "fetch('http://localhost:8000/health').then(r => r.ok ? Deno.exit(0) : Deno.exit(1))" || exit 1
+
+# Run the application
+CMD ["deno", "run", "--allow-net", "--allow-env", "src/main.ts"]