Add deployment docs (flyteorg#127)

Signed-off-by: Ketan Umare <[email protected]>

flytectl/docs/source/index.rst

@@ -122,6 +122,7 @@ Basic Configuration
    |book-reader| User Guide <https://docs.flyte.org/projects/cookbook/en/latest/user_guide.html>
    |chalkboard| Tutorials <https://docs.flyte.org/projects/cookbook/en/latest/tutorials.html>
    |project-diagram| Concepts <https://docs.flyte.org/en/latest/concepts/basics.html>
+   |rocket| Deployment <https://docs.flyte.org/en/latest/deployment/index.html>
    |book| API Reference <https://docs.flyte.org/en/latest/reference/index.html>
    |hands-helping| Community <https://docs.flyte.org/en/latest/community/index.html>