Create Dockerfile

Dockerfile

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+# 1. Use Alpine Linux for a minimal builder image
+FROM alpine AS builder
+
+# 2. Install Node.js, npm, and git
+RUN apk add --no-cache nodejs npm git
+
+# 3. Create a non-root user for safety
+RUN adduser -D app
+USER app
+
+# 4. Set working directory
+WORKDIR /home/app
+
+# 5. Clone Uptime Kuma repository
+RUN git clone https://github.com/louislam/uptime-kuma.git
+
+# 6. Install and build Uptime Kuma
+WORKDIR /home/app/uptime-kuma
+RUN npm run setup
+
+# 7. Expose the port (must match app_port above)
+EXPOSE 3001
+
+# 8. Start the Uptime Kuma server
+CMD ["node", "server/server.js"]