Things I've learnt that I've documented for reference.

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Using Docker BuildKit to Handle Secrets and SSH Keys During Build
Docker BuildKit allows you to securely pass sensitive data like API keys and SSH keys to builds without exposing them in image layers.
SHA256 is faster than MD5
For years I've used MD5 for file integrity checks in test scripts, assuming it was faster due to being a simpler algorithm. Turns out this is wrong.
Running Python scripts with Just and uv
Use Just task runner with uv's inline script support to run small scripts without managing venvs.
Cloudflare redirect loops with mismatched TLS settings
Page rules redirecting between domains with different TLS settings can cause infinite redirect loops.
Running Python scripts with uv shebang
Use uv to run Python scripts directly with dependencies with automatic venvs and direct execution

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