Update Go version in Dockerfile to support io package in channel/script.go:114. This is necessary because, from Go 1.16, the io package replaces ioutil, and using 1.15.2 on Dockerfile results in an undefined: io.ReadFile error while building containers.
Update Go version in Dockerfile to support io package in
channel/script.go:114. This is necessary because, from Go 1.16, the io package replaces ioutil, and using 1.15.2 on Dockerfile results in anundefined: io.ReadFileerror while building containers.