feat: dockerfile

[y-eight]

Motivation

Prepared Dockerfile for building the sparrow image.

Changes

For additional information look at the commits.

[niklastreml]

Scratch images come without certificates, please add them to the runner image, otherwise we won't be able to use https:

FROM alpine:latest as certs
RUN apk add --no-cache ca-certificates
...
# In your runner image
COPY --from=certs /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/

[y-eight]

Ive added the ca certs directly from gobuild stage

[puffitos]

I dislike having a variable go version (we don't have to abstract/ leave everything to the pipeline), but other than that, lgtm.

[y-eight]

I dislike having a variable go version (we don't have to abstract/ leave everything to the pipeline), but other than that, lgtm.

I have chaged it for now. I currently try to use goreleaser to build and release the image. Due to that the Dockerfile might change anyway because the goreleaser builds first (outside the docker context) and just copies the binary to the image.