Use golang instead alpine

[jmferrer]

Using alpine image docker build returns an error:

Step 3/8 : RUN go get -d github.com/optiopay/klar
 ---> Running in 6562fdf69543
package github.com/quay/clair/v3/pkg/commonerr: cannot find package "github.com/quay/clair/v3/pkg/commonerr" in any of:
	/usr/local/go/src/github.com/quay/clair/v3/pkg/commonerr (from $GOROOT)
	/go/src/github.com/quay/clair/v3/pkg/commonerr (from $GOPATH)
package github.com/quay/clair/v3/pkg/pagination: cannot find package "github.com/quay/clair/v3/pkg/pagination" in any of:
	/usr/local/go/src/github.com/quay/clair/v3/pkg/pagination (from $GOROOT)
	/go/src/github.com/quay/clair/v3/pkg/pagination (from $GOPATH)