feat: load every environment from --env-file to workflow (#184)

* feat: load every environment from --env-file to workflow

* fix: pass dotenv's environments through by context

* updates to support --secret-file

Co-authored-by: Casey Lee <cplee@nektos.com>

pkg/runner/run_context.go

@@ -45,7 +45,7 @@ type stepResult struct {
 // GetEnv returns the env for the context
 func (rc *RunContext) GetEnv() map[string]string {
 	if rc.Env == nil {
-		rc.Env = mergeMaps(rc.Run.Workflow.Env, rc.Run.Job().Env)
+		rc.Env = mergeMaps(rc.Config.Env, rc.Run.Workflow.Env, rc.Run.Job().Env)
 	}
 	return rc.Env
 }