pass GITHUB_TOKEN as secret to docker build, if it is present

Author: Tofel

framework/docker.go

@@ -418,19 +418,27 @@ func BuildImageOnce(once *sync.Once, dctx, dfile, nameAndTag string, buildArgs m
 
 func BuildImage(dctx, dfile, nameAndTag string, buildArgs map[string]string) error {
 	dfilePath := filepath.Join(dctx, dfile)
+
+	extraParameters := []string{}
+	if os.Getenv("GITHUB_TOKEN") != "" {
+		extraParameters = append(extraParameters, "--secret id=GIT_AUTH_TOKEN,env=GITHUB_TOKEN")
+	}
+
 	if os.Getenv("CTF_CLNODE_DLV") == "true" {
 		commandParts := []string{"docker", "build", "--build-arg", `GO_GCFLAGS=all=-N -l`, "--build-arg", "CHAINLINK_USER=chainlink"}
 		for k, v := range buildArgs {
 			commandParts = append(commandParts, "--build-arg", fmt.Sprintf("%s=%s", k, v))
 		}
 		commandParts = append(commandParts, "-t", nameAndTag, "-f", dfilePath, dctx)
+		commandParts = append(commandParts, extraParameters...)
 		return RunCommand(commandParts[0], commandParts[1:]...)
 	}
 	commandParts := []string{"docker", "build", "--build-arg", "CHAINLINK_USER=chainlink"}
 	for k, v := range buildArgs {
 		commandParts = append(commandParts, "--build-arg", fmt.Sprintf("%s=%s", k, v))
 	}
 	commandParts = append(commandParts, "-t", nameAndTag, "-f", dfilePath, dctx)
+	commandParts = append(commandParts, extraParameters...)
 	return RunCommand(commandParts[0], commandParts[1:]...)
 }