added gitignore file

Author: billcheng

.DS_Store

@@ -0,0 +1,27 @@
+# common
+.idea/
+.vscode/
+.DS_Store
+output/
+src/.idea/
+src/github.com/
+
+# Binaries for programs and plugins
+main
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+*.rar
+*.a
+*.xml
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+vendor/