Sync docs from Discourse (#649)

Co-authored-by: GitHub Actions <41898282+github-actions[bot]@users.noreply.github.com>

docs/reference/r-system-requirements.md

@@ -3,26 +3,26 @@
 The following are the minimum software and hardware requirements to run Charmed PostgreSQL on K8s.
 
 ## Software
-* Ubuntu 22.04 (Jammy) or later.
+* Ubuntu 22.04 LTS (Jammy) or later.
 
 ### Juju
 
-The charm supports both [Juju 2.9 LTS](https://github.com/juju/juju/releases) and [Juju 3.x](https://github.com/juju/juju/releases) with the following conditions:
+The charm supports several Juju releases from [2.9 LTS](https://juju.is/docs/juju/roadmap#juju-juju-29) onwards. The table below shows which minor versions of each major Juju release are supported by Charmed PostgreSQL.
 
-| Juju Releases | Juju Supported | Min charm revision |Comment |
+| Juju major release | Supported minor versions | Compatible charm revisions |Comment |
 |:--------|:-----|:-----|:-----|
-| 2.9 LTS | 2.9.32+ | 73+ | no tests made for older versions |
-| 3.1 | 3.1.7+ | 193+ | Juju secrets refactored/stabilized in Juju 3.1.7 |
-|  3.2 | 3.2.0+ | 280+ | no known issues |
-|  3.3 | 3.3.0+ | 280+ | no known issues |
-|  3.4 | 3.4.3+ | 280+  | know Juju issues with previous versions |
-|  3.5 | 3.5.1+ | 280+  | [known](https://bugs.launchpad.net/juju/+bug/2066517) Juju issue in 3.5.0 |
-|  3.6 LTS | 3.6.0-beta1 | 280+ |  LAB TESTS ONLY! No known issues. |
+| [![2.9 LTS]](https://juju.is/docs/juju/roadmap#juju-juju-29) | `2.9.32+` | 73+ | No tests for older Juju versions. |
+| [![3.1]](https://juju.is/docs/juju/roadmap#juju-juju-31) | `3.1.7+` | 193+ | Juju secrets were stabilized in `3.1.7` |
+| [![3.2]](https://juju.is/docs/juju/roadmap#juju-juju-32) | `3.2.0+` | 280+ | No known issues |
+| [![3.3]](https://juju.is/docs/juju/roadmap#juju-juju-33) | `3.3.0+` | 280+ | No known issues |
+| [![3.4]](https://juju.is/docs/juju/roadmap#juju-juju-34) | `3.4.3+` | 280+  | Know Juju issues with previous minor versions |
+| [![3.5]](https://juju.is/docs/juju/roadmap#juju-juju-35) | `3.5.1+` | 280+  | [Known Juju issue](https://bugs.launchpad.net/juju/+bug/2066517) in `3.5.0` |
+| ![3.6 LTS] | `3.6.0-beta1` | 280+ | No known issues, but still in beta. Not recommended for production. |
 
 ### Kubernetes
 
-* Kubernetes 1.27+
-* Canonical MicroK8s 1.27+ (snap channel 1.27-strict/stable and newer)
+* Kubernetes `1.27+`
+* Canonical MicroK8s `1.27+` (snap channel `1.27-strict/stable` and newer)
 
 ## Hardware
 
@@ -34,14 +34,24 @@ The charm supports both [Juju 2.9 LTS](https://github.com/juju/juju/releases) an
 ### Supported architectures
 The charm is based on the [charmed-postgresql snap](https://snapcraft.io/charmed-postgresql). It currently supports:
 * `amd64`
-* `arm64` (from revision 211+)
+* `arm64` (from revision `211+`)
 
 The charm is based on the [ROCK OCI](https://github.com/canonical/charmed-postgresql-rock) named [`charmed-postgresql`](https://github.com/canonical/charmed-postgresql-rock/pkgs/container/charmed-postgresql).
 
-[Contact us](/t/11852) if you are interested in new architecture!
+[Contact us](/t/11852) if you are interested in new architectures!
 
 ## Networking
 
 At the moment IPv4 is supported only (see more [info](https://warthogs.atlassian.net/browse/DPE-4695)).
 
-[Contact us](/t/11852) if you are interested in IPv6!
+[Contact us](/t/11852) if you are interested in IPv6!
+
+<!-- BADGES -->
+
+[2.9 LTS]: https://img.shields.io/badge/2.9_LTS-%23E95420?label=Juju
+[3.1]: https://img.shields.io/badge/3.1-%23E95420?label=Juju
+[3.2]: https://img.shields.io/badge/3.2-%23E95420?label=Juju
+[3.3]: https://img.shields.io/badge/3.3-%23E95420?label=Juju
+[3.4]: https://img.shields.io/badge/3.4-%23E95420?label=Juju
+[3.5]: https://img.shields.io/badge/3.5-%23E95420?label=Juju
+[3.6 LTS]: https://img.shields.io/badge/3.6_LTS-%23E95420?label=Juju