docs: update logo and readme (#1571)

This PR
- updates the logo from the default circle of friends to the juju logo
- updates the README to point to the new docs

README.md

@@ -7,21 +7,13 @@ The `ops` library is a Python framework for developing and testing Kubernetes an
 > - `ops` is  [available on PyPI](https://pypi.org/project/ops/).
 > - The latest version of `ops` requires Python 3.8 or above.
 
-||||
-|-|-|- |
-|| [Juju](https://juju.is/docs/juju) | Learn how to quickly deploy, integrate, and manage charms on any cloud with Juju. <br>  _It's as simple as `juju deploy foo`, `juju integrate foo bar`, and so on -- on any cloud._ |
-||||
-|| [Charmhub](https://charmhub.io/) | Sample our existing charms on Charmhub. <br> _A charm can be a cluster ([OpenStack](https://charmhub.io/openstack-base), [Kubernetes](https://charmhub.io/charmed-kubernetes)), a data platform ([PostgreSQL](https://charmhub.io/postgresql-k8s), [MongoDB](https://charmhub.io/mongodb), etc.), an observability stack ([Canonical Observability Stack](https://charmhub.io/cos-lite)), an MLOps solution ([Kubeflow](https://charmhub.io/kubeflow)), and so much more._ |
-||||
-|👉| [Charm&nbsp;SDK](https://juju.is/docs/sdk)  | Write your own charm! <br> _Juju is written in Go, but our SDK supports easy charm development in Python._  |
-
 ## Give it a try
 
 Let's use `ops` to build a Kubernetes charm:
 
 ### Set up
 
-> See [Charm SDK | Set up an Ubuntu `charm-dev` VM with Multipass](https://juju.is/docs/sdk/dev-setup#heading--automatic-set-up-an-ubuntu-charm-dev-vm-with-multipass). <br> Choose the MicroK8s track.
+> See [Juju | Set things up](https://canonical-juju.readthedocs-hosted.com/en/latest/user/howto/manage-your-deployment/manage-your-deployment-environment/#set-things-up). <br> Choose the automatic track and MicroK8s.
 
 
 ### Write your charm
@@ -150,27 +142,10 @@ Congratulations, you’ve just built your first Kubernetes charm using `ops`!
 
 ### Clean up
 
-> See [Charm SDK | Clean up](https://juju.is/docs/sdk/dev-setup#heading--automatic-set-up-an-ubuntu-charm-dev-vm-with-multipass).
+> See [Juju | Tear things down](https://canonical-juju.readthedocs-hosted.com/en/latest/user/howto/manage-your-deployment/manage-your-deployment-environment/#tear-things-down). <br> Choose the automatic track.
 
 ## Next steps
 
-### Learn more
-- Read our [user documentation](https://juju.is/docs/sdk/ops), which includes other guides showing `ops` in action
-- Dig into the [`ops` API reference](https://ops.readthedocs.io/en/latest/)
-
-### Chat with us
-
-Read our [Code of conduct](https://ubuntu.com/community/code-of-conduct) and:
-- Join our chat: [Mattermost](https://chat.charmhub.io/charmhub/channels/ops)
-- Join our forum: [Discourse](https://discourse.charmhub.io/)
-
-### File an issue
-
-- Report an `ops` bug using [GitHub issues](https://github.com/canonical/operator/issues)
-- Raise a general https://juju.is/docs documentation issue on [GitHub | juju/docs](https://github.com/juju/docs)
-
-### Make your mark
-
-- Read our [documentation contributor guidelines](https://discourse.charmhub.io/t/documentation-guidelines-for-contributors/1245) and help improve a doc
-- Read our [codebase contributor guidelines](https://github.com/canonical/operator/blob/main/HACKING.md) and help improve the codebase
-- Write a charm and publish it on [Charmhub](https://charmhub.io/)
+- Read the [docs](https://ops.readthedocs.io/en/latest/).
+- Read our [Code of conduct](https://ubuntu.com/community/code-of-conduct) and join our [chat](https://matrix.to/#/#charmhub-ops:ubuntu.com) and [forum](https://discourse.charmhub.io/) or [open an issue](https://github.com/canonical/operator/issues).
+- Read our [CONTRIBUTING guide](https://github.com/canonical/operator/blob/main/HACKING.md) and contribute!

docs/custom_conf.py

@@ -113,7 +113,8 @@
     # Add your product tag (the orange part of your logo, will be used in the
     # header) to ".sphinx/_static" and change the path here (start with "_static")
     # (default is the circle of friends)
-    'product_tag': '_static/tag.png',
+    # Assumes the current directory is .sphinx.
+    'product_tag': '_static/logos/juju-logo-no-text.png',
     # Change to the discourse instance you want to be able to link to
     # using the :discourse: metadata at the top of a file
     # (use an empty value if you don't want to link)