CONTRIBUTING: mention credentials
For localstack, mention the required credentials
/cc
### What is changed and how it works?
Document localstack credentials
### Check List <!--REMOVE the items that are not applicable-->
Tests
No code
### Release note <!-- bugfixes or new feature need a release note -->
None
@@ -214,3 +214,10 @@ region = "us-west-2"
endpoint = "http://localhost:4566"
key-id = "KMS key id"
```
+
+When you run TiKV, make sure to set the localstck credentials
+
+```
+export AWS_ACCESS_KEY_ID=test
+export AWS_SECRET_ACCESS_KEY=test
+```
