Update README/metadata/CONTRIBUTING (#121)

CONTRIBUTING.md

@@ -15,7 +15,7 @@ this operator.
 - All enhancements require review before being merged. Code review typically examines
   - code quality
   - test coverage
-  - user experience for Juju administrators this charm.
+  - user experience for Juju administrators of this charm.
 - Please help us out in ensuring easy to review branches by rebasing your pull request branch onto
   the `main` branch. This also avoids merge commits and creates a linear Git commit history.
 
@@ -38,7 +38,6 @@ tox run -e integration   # integration tests
 tox                      # runs 'lint' and 'unit' environments
 ```
 
-
 ## Build charm
 
 Build the charm in this git repository using:
@@ -52,8 +51,16 @@ charmcraft pack
 ```bash
 # Create a model
 juju add-model dev
+
 # Enable DEBUG logging
 juju model-config logging-config="<root>=INFO;unit=DEBUG"
+
 # Deploy the charm
 juju deploy ./postgresql_ubuntu-22.04-amd64.charm
-```
+```
+
+## Canonical Contributor Agreement
+
+Canonical welcomes contributions to the PostgreSQL Operator. Please check out our
+[contributor agreement](https://ubuntu.com/legal/contributors)if you're
+interested in contributing to the solution.

README.md

@@ -1,4 +1,4 @@
-# Charmed PostgreSQL Operator
+# Charmed PostgreSQL VM Operator
 
 ## Description
 

metadata.yaml

@@ -1,15 +1,19 @@
-# Copyright 2021 Canonical Ltd.
+# Copyright 2023 Canonical Ltd.
 # See LICENSE file for licensing details.
 
 name: postgresql
+display-name: Charmed PostgreSQL VM
+summary: Charmed PostgreSQL VM operator
 description: |
-  Charm to operate the PostgreSQL database on machines
+  Charm to operate the PostgreSQL database on machines.
 docs: https://discourse.charmhub.io/t/charmed-postgresql-documentation/9710
-summary: |
-  Charm to operate the PostgreSQL database on machines
-
-series:
-  - jammy
+source: https://github.com/canonical/postgresql-operator
+issues: https://github.com/canonical/postgresql-operator/issues
+website:
+  - https://ubuntu.com/data/postgresql
+  - https://charmhub.io/postgresql
+  - https://github.com/canonical/postgresql-operator
+  - https://chat.charmhub.io/charmhub/channels/data-platform
 
 peers:
   database-peers:
@@ -29,11 +33,16 @@ requires:
   certificates:
     interface: tls-certificates
     limit: 1
+    optional: true
   s3-parameters:
     interface: s3
     limit: 1
+    optional: true
 
 storage:
   pgdata:
     type: filesystem
     location: /var/snap/charmed-postgresql/common
+
+assumes:
+  - juju