Fix: correct Ollama installation using tar.zst format

[Mickyleitor]

This MR will change the following regarding the Ollama Dockerfile:

• Add zstd package to the apt-get install command
• Change URL from .tgz to .tar.zst (the correct Ollama download format)
• Update tar command to use --zstd flag instead of -z (gzip)
• Add cleanup of apt cache with rm -rf /var/lib/apt/lists/* to reduce image size

[gemini-code-assist]

Summary of Changes

Hello @Mickyleitor, 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This pull request refines the Ollama installation process within the Dockerfile by addressing an outdated download format. It ensures that Ollama is successfully installed by incorporating support for the .tar.zst archive, which includes installing the zstd utility and updating the tar extraction command. Additionally, it introduces an optimization to minimize the Docker image footprint by cleaning up the apt cache.

Highlights

• Ollama Download Format Update: The Ollama download URL has been updated from the .tgz format to the correct .tar.zst format, ensuring the latest version can be properly fetched.
• Zstd Package Installation: The zstd package is now installed in the Dockerfile, providing the necessary tools to decompress the new .tar.zst archive format.
• Tar Command Adjustment: The tar command has been modified to use the --zstd flag, correctly extracting the contents of the .tar.zst archive.
• Docker Image Size Optimization: An apt cache cleanup step (rm -rf /var/lib/apt/lists/*) has been added after package installation to reduce the final Docker image size.

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[gemini-code-assist]

Code Review

This pull request correctly fixes the Ollama installation in the Dockerfile by switching to the .tar.zst format. The changes, including adding the zstd package and updating the download and extraction commands, are appropriate. I've added a couple of suggestions to further optimize the Dockerfile by applying common best practices, such as using --no-install-recommends during package installation and piping curl output directly to tar. These changes will help reduce the final image size and improve the build process's efficiency.

[gemini-code-assist]

To optimize the Docker image size and follow best practices, it's recommended to use the --no-install-recommends flag with apt-get install. This prevents the installation of packages that are not strictly necessary for the main packages to function.

RUN apt-get update && apt-get install -y --no-install-recommends \
    curl \
    zstd && \
    rm -rf /var/lib/apt/lists/*

[gemini-code-assist]

To improve efficiency and avoid creating an intermediate file on the filesystem, you can pipe the output of curl directly into tar. This makes the command cleaner and avoids the need for a separate rm step.

    curl -L "https://ollama.com/download/ollama-linux-${OLLAMA_ARCH}.tar.zst" | tar --zstd -x -C /usr