Add doc that clusterctl generate yaml can use raw template URL

Signed-off-by: Aniruddha Basak <[email protected]>

Author: aniruddha2000

docs/book/src/clusterctl/commands/generate-cluster.md

@@ -69,9 +69,9 @@ clusterctl generate cluster my-cluster --kubernetes-version v1.16.3 \
 Also following flags are available `--from-config-map-namespace` (defaults to current namespace) and `--from-config-map-key`
 (defaults to `template`).
 
-#### GitHub, local file system folder or standard input
+#### GitHub, raw template URL, local file system folder or standard input
 
-Use the `--from` flag to read cluster templates stored in a GitHub repository, in a local file system folder,
+Use the `--from` flag to read cluster templates stored in a GitHub repository, raw template URL, in a local file system folder,
 or from the standard input; e.g.
 
 ```bash
@@ -81,6 +81,13 @@ clusterctl generate cluster my-cluster --kubernetes-version v1.16.3 \
 
 or
 
+```bash
+clusterctl generate cluster my-cluster --kubernetes-version v1.16.3 \
+   --from https://foo.bar/my-template.yaml > my-cluster.yaml
+```
+
+or
+
 ```bash
 clusterctl generate cluster my-cluster --kubernetes-version v1.16.3 \
    --from ~/my-template.yaml > my-cluster.yaml

docs/book/src/clusterctl/commands/generate-yaml.md

@@ -20,9 +20,11 @@ from environment variables.
 Current usage of the command is as follows:
 ```bash
 # Generates a configuration file with variable values using a template from a
-# specific URL.
+# specific URL as well as a GitHub URL.
 clusterctl generate yaml --from https://github.com/foo-org/foo-repository/blob/main/cluster-template.yaml
 
+clusterctl generate yaml --from https://foo.bar/cluster-template.yaml
+
 # Generates a configuration file with variable values using
 # a template stored locally.
 clusterctl generate yaml  --from ~/workspace/cluster-template.yaml