Update settings for Golang

[gabriel-dantas98]

What happened:

I was researching the kubeless documentation and realized that currently, we can only use the go dep, we would be continually updating it for the go mod. 😄

I also noticed that the latest runtime version is 1.12 and we are currently at 1.14.

If issues already exist on these subjects, I would like to be able to contribute. 😉 🚀

[andresmgot]

yes, we never had the time to refresh this. If you can contribute that'd be great, happy to help with any issue you may find :)

[gabriel-dantas98]

Very cool, do you already have a path that I can follow?

I believe that the best first would be to upgrade to go modules. Then I update the runtime versions.
I can do this in 2 separate PR's.

[andresmgot]

I don't have nothing documented unfortunately. The code is here:

https://github.com/kubeless/runtimes/tree/master/stable/golang

Here you can see that Kubeless is looking for a file Gopkg.toml to run dep ensure:

https://github.com/kubeless/runtimes/blob/master/stable/golang/golang.jsonnet#L65

https://github.com/kubeless/runtimes/blob/master/stable/golang/golang.jsonnet#L14

We would need to also update the runtime to use go.mod as well (there is one Dockerfile per Golang version):

https://github.com/kubeless/runtimes/blob/master/stable/golang/Dockerfile.init#L18

Hope that's enough for you to start working on this.