Add provenance and concurrency limits to Docker builds #783

Job	Run time
Checks	11s
Rust project (ubuntu-latest)	52s
Rust project (macos-latest)	15s
Cross-build (armv7-linux-androideabi)	1m 11s
Rust project (windows-latest)	3m 0s
Test in Alpine	1m 6s
Cross-build (armv7-unknown-linux-gnueabihf)	59s
Cross-build (armv7-unknown-linux-musleabihf)	1m 25s
Cross-build (aarch64-unknown-linux-gnu)	1m 0s
Cross-build (aarch64-unknown-linux-musl)	1m 5s
Cross-build (x86_64-unknown-linux-musl)	34s
Release	0s
	11m 38s

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