Rename Dockerfile #14133

Job	Run time
Ensure compilation on various targets	11m 40s
Run rust tests (windows-latest)	13m 11s
Run rust tests (ubuntu-latest)	5m 25s
Check Rust code with rustfmt and clippy	4m 25s
Run snippets and cpython tests (ubuntu-latest)	14m 37s
Run snippets and cpython tests (macos-latest)	11m 20s
Run rust tests (macos-latest)	4m 1s
Check the WASM package and demo	4m 3s
Run tests under miri	2m 56s
Run snippets and cpython tests on wasm-wasi	1m 53s
Run snippets and cpython tests (windows-latest)	23m 53s
	1h 37m 24s

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