Improve docker build performance

[chowder]

Description

1. Use GitHub Actions cache to cache docker blobs so that images are incrementally updated instead of re-building from scratch.
2. Add piwheels as an additional index to reduce the need to build wheels from source when building images for ARM.

Unfortunately it doesn't address the fact that we still need to build pandas from source (since piwheels don't provide wheels for Python 3.11), and that takes up majority of the build time.

See: #232

How Has This Been Tested?

The following two GH Actions runs on my fork are successful, with the second one taking only 15s for a no-op rebuild:

https://github.com/chowder/Twitch-Channel-Points-Miner-v2/actions/runs/4588562374
https://github.com/chowder/Twitch-Channel-Points-Miner-v2/actions/runs/4589448613

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented on my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (README.md)
• My changes generate no new warnings
• Any dependent changes have been updated in requirements.txt

[chowder]

For hermeticity we should also be pinning the dependency versions in requirements.txt

[rdavydov]

2. Add piwheels as an additional index to reduce the need to build wheels from source when building images for ARM.

Unfortunately it doesn't address the fact that we still need to build pandas from source (since piwheels don't provide wheels for Python 3.11), and that takes up majority of the build time.

pandas and numpy are the only ones that are building from sources, so this part is not really necessary.

Regarding caching - awesome, thanks!

[rdavydov]

@chowder ^

[rdavydov]

@chowder Won't it affect other platforms: AMD64 and ARM64? https://www.piwheels.org/simple/pandas/ only has ARMv6 and ARMv7 packages.

[rdavydov]

OK, let's test this.

[silentguy256]

@chowder Hm, is it possible that you change from "push: true" to "push: false" was only for debugging? Because currently I don't see the container even though it was build successfully

@rdavydov from that he said in my FR it should not have affected the other platforms because he used --extra-index-url instead of --index-url

[rdavydov]

@silentguy256 There is no need in piwheels.

pandas and numpy are the only ones that are building from sources, so this part is not really necessary.

And now we have caching, so let's just leave it without piwheels.

Hm, is it possible that you change from "push: true" to "push: false" was only for debugging? Because currently I don't see the container even though it was build successfully

Whoops, that's right. Need to change that and test caching.

[rdavydov]

@silentguy256 Caching works, ~20s! Containers are there now. Thanks for the heads up!