Packer configuration to make a Docker image for building golang programs
Packer is a great way to build Docker images. This uses Alpine + glibc (needed by Go) from frolvlad/alpine-glibc
Docker is required to be installed on the host in which you build this image, so make sure it's installed, and then install Packer
From there it's a simple packer build gobuild.json. Packer should pull down the alpine-glibc image and run the provision script to set up the Go environment.
Within the Docker container, the Go installation will be at /usr/local/go, and the $GOPATH will default to ~/go, so /root/go. Both /usr/local/go/bin and /root/go/bin will be in the $PATH.
Resulting image size is approx 362MB.