Merge ~mthaddon/charm-k8s-ingress/+git/charm-k8s-ingress:readme-release-candidate into charm-k8s-ingress:master

[Tom Haddon]

We can use Juju 2.9-rc8 or later, update README to reflect this

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Change successfully merged at revision c004e056dafd4754653d2cfc8acf4168f62105d4

diff --git a/README.md b/README.md
index d1dc427..f98aad4 100644
--- a/README.md
+++ b/README.md
@@ -19,17 +19,8 @@ below.
 
 To build the charm, run `charmcraft build`.
 
-You'll need version 1.14 or later of Go (`go version` will confirm your current version), and a custom version of the Juju 2.9 branch, as below:
+You'll need version to be using Juju [version 2.9-rc8](https://discourse.charmhub.io/t/juju-2-9-rc8-release-notes/4394/) or later.
 
-```
-git clone -b 2.9 https://github.com/juju/juju
-cd juju
-make install
-make microk8s-operator-update  # to make the microk8s image and push to Docker
-export PATH="/home/${USER}/go/bin:$PATH"
-juju bootstrap microk8s --no-gui
-juju add-model ingress-test
-```
 Once https://bugs.launchpad.net/juju/+bug/1920102 has been addressed, this
 charm will be able to use the credentials provided in cluster. However, for
 now, you will need to provide this charm with credentials to be able to talk