Add comments for speeding up installations in China

[hass-demacia]

Added comments for alternative commands to speed up installations in China.

[gemini-code-assist]

Summary of Changes

Hello @hass-demacia, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces helpful commented-out alternative commands within the Dockerfile to significantly enhance the speed of dependency installations for npm, pip, and apt-get when building in China. By leveraging local mirror repositories, this change aims to improve the efficiency of the build process for developers in that region without altering the default build behavior.

Highlights

• NPM Installation Speedup: Added a commented-out alternative npm ci command that utilizes registry.npmmirror.com to accelerate Node.js package installations for users in China.
• PIP Installation Speedup: Included a commented-out pip install command that specifies mirrors.aliyun.com/pypi/simple/ as an index URL, aiming to speed up Python dependency installations in China.
• APT Installation Speedup: Provided commented-out sed and apt-get commands to configure Debian package sources to mirrors.aliyun.com, thereby improving the speed of system package installations via apt-get in China.

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[gemini-code-assist]

Code Review

This pull request aims to help users in China by providing alternative mirrors for package installations. While this is a good initiative, the implementation can be improved for better maintainability and correctness.

I've made the following suggestions:

• For npm, pip, and apt-get installations, I've recommended using Docker build arguments (ARG) instead of commented-out code. This is a cleaner, more robust, and idiomatic way to handle environment-specific configurations like package mirrors.
• The change for pip installation was incorrect as it introduced a redundant command, creating an unnecessary layer in the Docker image. I've provided a fix for this that also uses a build argument.

By adopting these suggestions, the Dockerfile will be more flexible and easier to use for developers in all regions without needing to modify the file itself.

[gemini-code-assist]

This change introduces a second RUN pip install ... command. This is redundant because the first pip install (using the Aliyun mirror) will have already installed the packages. This creates an unnecessary layer in the Docker image and can be confusing. The likely intention was to provide a commented-out alternative, similar to the npm change.

A better approach is to use a build argument for the PyPI mirror. This makes the Dockerfile cleaner, more maintainable, and avoids the redundant command. The if statement preserves the default behavior when no mirror is provided.

# Optionally, specify a PyPI mirror, e.g., --build-arg PYPI_INDEX_URL=https://mirrors.aliyun.com/pypi/simple/
ARG PYPI_INDEX_URL
RUN if [ -n "$PYPI_INDEX_URL" ]; then \
        pip install -i "$PYPI_INDEX_URL" --no-cache -r api/requirements.txt; \
    else \
        pip install --no-cache -r api/requirements.txt; \
    fi

[gemini-code-assist]

While adding a commented-out alternative is helpful, a more robust and cleaner approach for handling alternative package registries is to use build arguments. This avoids having commented-out code in the Dockerfile and makes it easier for users to switch registries without editing the file. The if statement ensures the default behavior is preserved if no mirror is specified.

# Optionally, specify an npm registry mirror, e.g., --build-arg NPM_REGISTRY=https://registry.npmmirror.com
ARG NPM_REGISTRY
RUN if [ -n "$NPM_REGISTRY" ]; then \
        npm ci --legacy-peer-deps --registry="$NPM_REGISTRY"; \
    else \
        npm ci --legacy-peer-deps; \
    fi

[gemini-code-assist]

Similar to the npm and pip installations, using a build argument for the Debian mirror is a cleaner and more maintainable approach than having commented-out code. This allows users to easily specify a mirror at build time without modifying the Dockerfile. The if statement ensures that the sed command only runs if a mirror is provided, making it more robust.

# Optionally, specify a Debian mirror, e.g., --build-arg DEBIAN_MIRROR=mirrors.aliyun.com
ARG DEBIAN_MIRROR
RUN if [ -n "$DEBIAN_MIRROR" ]; then \
        sed -i "s|deb.debian.org|$DEBIAN_MIRROR|g" /etc/apt/sources.list.d/debian.sources; \
    fi && \
    apt-get update && apt-get install -y \