Flux 1.12.1

This is a patch release.

Fixes

• Be more tolerant of image manifests being missing in the registry, when we don't need them weaveworks/flux#1916
• Give image registry fetches a timeout, so the image metadata DB doesn't get stuck weaveworks/flux#1970
• Allow insecure host arguments to exclude the port weaveworks/flux#1967
• Make sure client-go logs to stderr weaveworks/flux#1945
• Cope gracefully when custom API resources are not present in the cluster or in git (and therefore we cannot determine how a custom resource is scoped) weaveworks/flux#1943
• Warn when the configured branch does not exist in git, and use the configured branch to check writablility weaveworks/flux#1937
• Deal with YAML document end markers weaveworks/flux#1931, weaveworks/flux#1973

Maintenance and documentation

• Add some known production users to the README weaveworks/flux#1958, weaveworks/flux#1946, weaveworks/flux#1932
• Move images to DockerHub and have a separate pre-releases image repo weaveworks/flux#1949, weaveworks/flux#1956
• Suppoort arm and arm64 builds weaveworks/flux#1950
• Refactor the core image metadata fetching func weaveworks/flux#1935
• Update client-go to v1.11 weaveworks/flux#1929
• Retry keyscan when building images, to mitigate for occasional timeouts weaveworks/flux#1971
• Give the GitHub repo an issue template for bug reports weaveworks/flux#1968

Thanks

Thanks to @2opremio, @UnwashedMeme, @alexanderbuhler, @aronne, @arturo-c, @autarchprinceps, @benhartley, @brantb, @brezerk, @dholbach, @dlespiau, @dvelitchkov, @dwightbiddle-ef, @gtseres, @hiddeco, @hpurmann, @ingshtrom, @isen-ng, @jimangel, @jpds, @kingdonb, @koustubh25, @koustubhg, @michaelfig, @moltar, @nabadger, @primeroz, @rdubya16, @squaremo, @stealthybox, @stefanprodan, @tycoles for contributions.