Add user-friendly build system design

.dockerignore

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+Dockerfile
+!server/go.mod
+server/go.sum
+server/NanoKVM-Server
+web
+
+support/sg2002/kvm_system/build
+support/sg2002/kvm_system/dist
+support/sg2002/kvm_system/CMakeLists.txt
+
+support/sg2002/kvm_vision_test/build
+support/sg2002/kvm_vision_test/dist
+support/sg2002/kvm_vision_test/CMakeLists.txt

Makefile

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+# Makefile for NanoKVM Project
+
+# Configuration
+IMAGE_NAME := nanokvm-builder
+UID := $(shell id -u)
+GID := $(shell id -g)
+PWD := $(shell pwd)
+
+# Docker run common parameters
+DOCKER_RUN_BASE := docker run -e UID=$(UID) -e GID=$(GID) -v $(PWD):/home/build/NanoKVM --rm
+
+# Build commands
+GO_BUILD_CMD := cd /home/build/NanoKVM/server && go mod tidy && CGO_ENABLED=1 GOOS=linux GOARCH=riscv64 CC=riscv64-unknown-linux-musl-gcc CGO_CFLAGS="-mcpu=c906fdv -march=rv64imafdcv0p7xthead -mcmodel=medany -mabi=lp64d" go build
+SUPPORT_BUILD_CMD := . ./home/build/MaixCDK/bin/activate && cd /home/build/NanoKVM/support/sg2002 && ./build kvm_system && ./build kvm_system add_to_kvmapp
+
+.PHONY: help check-root builder-image rebuild-image check-image shell app support all clean
+
+# Default target
+all: app support
+
+# Help target
+help:
+	@echo "NanoKVM Build System"
+	@echo ""
+	@echo "Available targets:"
+	@echo "  help          - Show this help message"
+	@echo "  check-image   - Check builder Docker image and show versions"
+	@echo "  builder-image - Build Docker image if not exists"
+	@echo "  rebuild-image - Force rebuild Docker image"
+	@echo "  shell         - Enter interactive builder environment"
+	@echo "  app           - Build Go application server"
+	@echo "  support       - Build hardware support libraries"
+	@echo "  all           - Build both app and support (default)"
+	@echo "  clean         - Clean build artifacts"
+	@echo ""
+	@echo "Prerequisites:"
+	@echo "  - Docker must be installed and running"
+	@echo "  - Must not run as root user"
+
+# Security check - prevent running as root
+check-root:
+	@if [ "$$(id -u)" -eq 0 ]; then \
+		echo "Can't run as root"; \
+		exit 1; \
+	fi
+
+# Check if builder image exists and show versions
+check-image: check-root
+	@echo "Checking builder image..."
+	@echo "Golang version: " && \
+		docker run --rm -i $(IMAGE_NAME) go version && \
+		echo "" && \
+		echo "Host-tools version:" && \
+		docker run --rm -i $(IMAGE_NAME) riscv64-unknown-linux-musl-gcc -v && \
+		echo ""
+
+# Build Docker image if it doesn't exist
+builder-image: check-root
+	@if ! docker image inspect $(IMAGE_NAME) >/dev/null 2>&1; then \
+		echo "Building Docker image..."; \
+		docker build -t $(IMAGE_NAME) -f docker/Dockerfile ./; \
+	else \
+		echo "Docker image $(IMAGE_NAME) already exists."; \
+	fi
+
+# Force rebuild Docker image
+rebuild-image: check-root
+	@echo "Force rebuilding Docker image..."
+	@docker build --no-cache -t $(IMAGE_NAME) -f docker/Dockerfile ./
+
+# Enter interactive shell (equivalent to build.sh with no arguments)
+shell: check-root builder-image
+	@echo "Switching into builder..."
+	@$(DOCKER_RUN_BASE) -it $(IMAGE_NAME) /bin/bash -c ". ./home/build/MaixCDK/bin/activate && cd /home/build/NanoKVM ; exec bash"
+
+# Build Go application
+app: check-root builder-image
+	@echo "Building app..."
+	@$(DOCKER_RUN_BASE) -it $(IMAGE_NAME) /bin/bash -c '$(GO_BUILD_CMD)'
+
+# Build hardware support libraries
+support: check-root builder-image
+	@echo "Building support..."
+	@$(DOCKER_RUN_BASE) -it $(IMAGE_NAME) /bin/bash -c '$(SUPPORT_BUILD_CMD)'
+
+# Clean build artifacts
+clean:
+	@echo "Cleaning build artifacts..."
+	@if [ -f server/NanoKVM-Server ]; then \
+		rm -f server/NanoKVM-Server; \
+		echo "Removed server/NanoKVM-Server"; \
+	fi
+	@if [ -d support/sg2002/build ]; then \
+		rm -rf support/sg2002/build; \
+		echo "Removed support/sg2002/build"; \
+	fi
+	@echo "Clean completed."

docker/Dockerfile

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+FROM ubuntu:24.04 AS base_apt
+
+# RUN echo 'Acquire::http::Proxy "http://cache.lan:3142";' > /etc/apt/apt.conf.d/00cacher
+RUN userdel -r ubuntu
+RUN apt update \
+    && apt install wget git cmake build-essential python3 python3-venv python3-pip autoconf automake libtool gosu -y
+
+ARG DOCKER_USER=build
+RUN useradd -m "$DOCKER_USER"
+USER $DOCKER_USER
+
+FROM base_apt AS host_tools
+
+USER root
+RUN wget -O /tmp/host-tools.tar.gz https://sophon-file.sophon.cn/sophon-prod-s3/drive/23/03/07/16/host-tools.tar.gz \
+    && tar -C /usr/local -zxvf /tmp/host-tools.tar.gz  \
+    && rm -f /tmp/host-tools.tar.gz \
+    && export PATH=$PATH:/usr/local/host-tools/gcc/riscv64-linux-musl-x86_64/bin \
+    && echo "Installed host-tools gcc" && riscv64-unknown-linux-musl-gcc -v
+
+FROM base_apt AS golang
+
+USER root
+RUN bash -c 'wget -O /tmp/go.tar.gz https://go.dev/dl/go1.25.0.linux-$([ `uname -m` == "x86_64" ] && echo "amd64" || uname -m).tar.gz' \
+    && tar -C /usr/local -zxvf /tmp/go.tar.gz \
+    && export PATH=$PATH:/usr/local/go/bin \
+    && echo "Installed golang" &&  go version
+
+COPY server /tmp/go_cache
+
+ENV PATH="$PATH:/usr/local/go/bin"
+
+RUN cd /tmp/go_cache \
+    && echo "Caching go dep" \
+    && go mod download \
+    && go mod tidy \
+    && cd / \
+    && rm -rf /tmp/go_cache
+
+FROM base_apt AS sdk
+
+RUN cd ~ \
+    && git clone https://github.com/Sipeed/MaixCDK \
+    && cd MaixCDK \
+    && python3 -m venv . \
+    && . ./bin/activate \
+    && pip install -U -r requirements.txt 
+
+COPY --chown=$DOCKER_USER . /home/$DOCKER_USER/NanoKVM
+
+RUN cd ~/MaixCDK \
+    && . ./bin/activate \
+    && cd ~/NanoKVM/support/sg2002 \
+    && ./build kvm_system
+
+FROM base_apt
+
+# Install golang
+COPY --from=golang /usr/local/go /usr/local/go
+COPY --chown=$DOCKER_USER --from=golang /root/go /home/$DOCKER_USER/go
+ENV PATH="$PATH:/usr/local/go/bin"
+
+# Install host tools
+COPY --from=host_tools /usr/local/host-tools /usr/local/host-tools
+ENV PATH="$PATH:/usr/local/host-tools/gcc/riscv64-linux-musl-x86_64/bin"
+
+# Install SDK
+COPY --from=sdk /home/$DOCKER_USER/MaixCDK /home/$DOCKER_USER/MaixCDK
+COPY --chmod=+x docker/entrypoint /entrypoint
+
+RUN echo "Verify build tools" \
+    && echo "Installed host-tools gcc" && riscv64-unknown-linux-musl-gcc -v \
+    && echo "Installed golang" && go version
+
+USER root
+RUN chmod 0755 /entrypoint \
+ && sed "s/\$DOCKER_USER/$DOCKER_USER/g" -i /entrypoint
+
+ENTRYPOINT ["/entrypoint"]

docker/entrypoint

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+#!/bin/sh
+
+set -e
+set -u
+
+: "${UID:=0}"
+: "${GID:=${UID}}"
+
+if [ "$#" = 0 ]
+then set -- "$(command -v bash 2>/dev/null || command -v sh)" -l
+fi
+
+if [ "$UID" != 0 ]
+then
+        usermod -u "$UID" "$DOCKER_USER" 2>/dev/null && {
+                groupmod -g "$GID" "$DOCKER_USER" 2>/dev/null ||
+                usermod -a -G "$GID" "$DOCKER_USER"
+        }
+        set -- gosu "${UID}:${GID}" "${@}"
+fi
+
+exec "$@"