added CONTRIBUTING.md

CONTRIBUTING.md

@@ -0,0 +1,32 @@
+## Contributing
+
+Thanks for your interest in contribute to dynmgrm!
+
+
+### Getting Started
+
+1. [Fork `miyamo2/dynmgrm`](https://github.com/miyamo2/dynmgrm/fork)
+
+2. Clone your fork repository locally
+
+```sh
+git clone https://github.com/{YOUR_USERNAME}/dynmgrm.git
+```
+3. Check out to the working branch
+
+```sh
+git checkout -b cool_branch_name
+```
+
+### Unit Test
+
+```sh
+go test -v ./... 
+```
+
+### Integration Test with DynamoDB Local
+
+```sh
+cd ./integrationtest
+make test
+```

README.md

@@ -180,6 +180,8 @@ Feel free to open a PR or an Issue.
 
 However, you must promise to follow our [Code of Conduct](https://github.com/miyamo2/dynmgrm/blob/main/CODE_OF_CONDUCT.md).
 
+See [here](https://github.com/miyamo2/dynmgrm/blob/main/CONTRIBUTING.md) for more details on contributing.
+
 ## License
 
 **dynmgrm** released under the [MIT License](https://github.com/miyamo2/dynmgrm/blob/main/LICENSE)