chore: enable cgo and use google buildbase #81
Merged
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cgo needs to be enabled to link against boringcrypto, so we add that
here.
In addition, we use the google-go.pkg.dev/golang image as the Go
buildbase to ensure build-time requirements, like boringcrypto, are
enabled.
We also use gke.gcr.io/gke-distroless/libc as our runtime image.
We add the "cryp/tls/fipsonly" import to ensure boringcrypto is
linking properly at build time. We guard this with a build tag
"boring" in a dedicated file.
Finally, we move away from promu in our Dockerfile as it was not obvious
how to pass a go build tag through just in the Docker case. We remove
amtool from the image, as its not intended to be used. This involved
mimicing a lot of what we do in the Prometheus fork's Dockerfile.