change base image

[JacksonMei]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @JacksonMei, 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 refactors the default Dockerfile template by transitioning from a generic Python base image to a custom, parameterized base image. This change aims to enhance control and standardization over the build environment, ensuring consistency across deployments. Additionally, it includes a minor adjustment to explicitly use python3 for package installations.

Highlights

• Base Image Update: The Dockerfile's base image has been changed from a generic python:3.12-slim to a custom image defined by AENV_BASE_REGISTRY, AENV_BASE_IMAGE, and AENV_BASE_VERSION arguments, allowing for more controlled and standardized environments.
• Explicit Python 3 Usage: The pip install command within the Dockerfile now explicitly calls python3 instead of python.
• New Build Arguments: Introduced new ARG declarations (AENV_BASE_REGISTRY, AENV_BASE_IMAGE, AENV_BASE_VERSION) to provide greater flexibility in specifying the custom base image during the build process.

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[gemini-code-assist]

Code Review

This pull request updates the base Docker image used in the default project template. The new base image is now configurable via build arguments, which is a good improvement. My review includes a few suggestions for the Dockerfile to optimize build times by leveraging layer caching, improve container shutdown behavior by using the exec form for ENTRYPOINT, and to remove a temporary comment.

[gemini-code-assist]

To leverage Docker's layer caching more effectively, you should copy requirements.txt and install dependencies before copying the rest of the application code. This prevents re-installing dependencies every time a source file changes, which can significantly speed up the build process.

I suggest changing these lines to:

COPY requirements.txt /app/requirements.txt
RUN python3 -m pip install --no-cache-dir -r /app/requirements.txt
COPY . .

[gemini-code-assist]

Using the shell form of ENTRYPOINT (e.g., ENTRYPOINT ["/bin/bash", "-c"]) can cause issues with signal handling. The shell process (PID 1) might not forward signals like SIGTERM to your application, preventing a graceful shutdown. It's better to use the 'exec' form, which makes your application the main process (PID 1) in the container.

ENTRYPOINT ["python3", "-m", "aenv.main"]
CMD ["/app/src"]

[gemini-code-assist]

This comment appears to be for testing and should be removed to keep the Dockerfile template clean and professional.

[kangoal]

LGTM