docs: Adding steps for creating a release (#188)

Author: davidjumani

docs/book/src/SUMMARY.md

@@ -14,3 +14,4 @@
     - [Development With Tilt](development/tilt.md)
     - [Building CAPC](development/building.md)
     - [E2E Tests](development/e2e.md)
+    - [Releasing](development/releasing.md)

docs/book/src/development/releasing.md

@@ -0,0 +1,39 @@
+# Releasing Cluster API Provider for CloudStack
+
+## Prerequisites:
+
+1. Please install the following tools :
+    - [go][go]
+    - [Docker][docker-install]
+    - [gcloud][gcloud-install]
+
+2. Set up and log in to gcloud by running `gcloud init`
+   > In order to publish any artifact, you need to be a member of the [k8s-infra-staging-capi-cloudstack][k8s-infra-staging-capi-cloudstack] group
+
+## Creating only the docker container
+
+If you would just like to build only the docker container and upload it rather than creating a release, you can run the following command :
+```
+REGISTRY=<your custom registry> IMAGE_NAME=<your custom image name> TAG=<your custom tag> make docker-build
+```
+It defaults to `gcr.io/k8s-staging-capi-cloudstack/capi-cloudstack-controller:dev`
+
+
+## Creating a new release
+
+Run the following command to create the new release artifacts as well as publish them to the upstream gcr.io repository :
+```
+RELEASE_TAG=<your custom tag> make release-staging
+```
+
+Create the necessary release in GitHub along with the following artifacts ( found in the `out` directory after running the previous command )
+- metadata.yaml
+- infrastructure-components.yaml
+- cluster-template*.yaml
+
+
+
+[docker-install]: https://www.docker.com/
+[go]: https://golang.org/doc/install
+[gcloud-install]: https://cloud.google.com/sdk/docs/install
+[k8s-infra-staging-capi-cloudstack]: https://github.com/kubernetes/k8s.io/blob/main/groups/sig-cluster-lifecycle/groups.yaml#L106