contributing: add instructions for local vault
@@ -230,6 +230,16 @@ $ docker-compose \
```
+### Running Vault locally
+
+1. Make sure you have [`certstrap`]
+2. Run `./hack/vault/setup`, and follow the instructions.
+
+See more about in the section [The Vault credential manager].
+
+[The Vault credential Manager]: https://concourse-ci.org/vault-credential-manager.html
+[`certstrap`]: https://github.com/square/certstrap
+
### Running Prometheus locally
