chore: scaffold initial project with gitignore, demo app, docker setup, and requirements

system/Dockerfile

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+FROM alpine:latest
+
+# Install bash
+RUN apk add --no-cache bash
+
+# Create non-root user
+RUN adduser -D -s /bin/bash myuser
+
+# Switch to non-root user
+USER myuser
+
+# Set working directory
+WORKDIR /home/myuser
+
+# Default command
+CMD ["/bin/bash"]