Create Dockerfile

Dockerfile

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+FROM node:22-alpine
+
+# Install build dependencies that some npm packages require
+RUN apk --no-cache add python3 make g++ linux-headers
+
+# Set the working directory
+WORKDIR /app
+
+# Install 9router globally via npm
+RUN npm install -g 9router
+
+# Configure default 9router environment variables
+ENV NODE_ENV=production
+ENV PORT=20128
+ENV HOSTNAME=0.0.0.0
+ENV DATA_DIR=/app/data
+
+# Expose the default 9router dashboard and API port
+EXPOSE 20128
+
+# Execute the 9router CLI application on startup
+CMD ["9router"]