Change Docker images to use non-baseline by default

[Electroid]

When we first introduced the Docker images for Bun, we decided to use baseline images for maximum compatibility. However, most production environments that deploy these images support AVX2 instructions.

We should change the default in Bun 1.2 to use the non-baseline images, and introduce new -baseline tags for folks that need the baseline versions.

[birkskyum]

Is there somewhere I can read up on what the baseline docker image is? I'm not familiar with it, and how it compares to non-baseline.