added license header to source code

Author: manpatel

.gitignore

@@ -13,4 +13,7 @@
 
 # Terrafile output
 vendor/modules
-terrafile
+terrafile
+
+#IDEs
+.idea/

main.go

@@ -1,3 +1,19 @@
+/*
+Copyright 2021 IDT Corp.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 package main
 
 import (