feat: use explicite image hub URL in compose.yml #704

Job	Run time
Build & test (stable, ubuntu-latest)	1m 55s
Build & test (stable, macos-latest)	1m 19s
Build & test (stable, windows-latest)	5m 6s
Build & test (nightly, ubuntu-latest)	4m 32s
Build & test (nightly, macos-latest)	4m 15s
Build & test (nightly, windows-latest)	8m 33s
Code formatting checks	22s
Test with external dependencies	4m 36s
Test coverage checks	4m 17s
Machete dependencies checks	9s
Clippy lint checks	27s
Minimal dependency versions build	1m 24s
Build with each feature combination	2m 14s
Miri test	6m 26s
	45m 35s

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