Added Lambda Node support as part of the regular functions workflow. (#601)

* Added Lambda Node support as part of the regular functions workflow.

* Fixes for PR comments.

fn/langs/lambda_node.go

@@ -0,0 +1,26 @@
+package langs
+
+type LambdaNodeHelper struct {
+	BaseHelper
+}
+
+func (lh *LambdaNodeHelper) Entrypoint() string {
+	return ""
+}
+
+func (lh *LambdaNodeHelper) Cmd() string {
+	return "func.handler"
+}
+
+func (lh *LambdaNodeHelper) HasPreBuild() bool {
+	return false
+}
+
+// PreBuild for Go builds the binary so the final image can be as small as possible
+func (lh *LambdaNodeHelper) PreBuild() error {
+	return nil
+}
+
+func (lh *LambdaNodeHelper) AfterBuild() error {
+	return nil
+}