docs: rpm/deb beta repo.

docs/sources/installation/debian.md

@@ -47,6 +47,12 @@ Create a file `/etc/apt/sources.list.d/grafana.list` and add the following to it
 deb https://packages.grafana.com/oss/deb stable main
 deb https://packages.grafana.com/oss/deb stable main
 ```
 ```
 
 
+There is a separate repository if you want beta releases.
+
+```bash
+deb https://packages.grafana.com/oss/deb beta main
+```
+
 Use the above line even if you are on Ubuntu or another Debian version. Then add our gpg key. This allows you to install signed packages.
 Use the above line even if you are on Ubuntu or another Debian version. Then add our gpg key. This allows you to install signed packages.
 
 
 ```bash
 ```bash

docs/sources/installation/rpm.md

@@ -76,6 +76,20 @@ sslverify=1
 sslcacert=/etc/pki/tls/certs/ca-bundle.crt
 sslcacert=/etc/pki/tls/certs/ca-bundle.crt
 ```
 ```
 
 
+There is a separate repository if you want beta releases.
+
+```bash
+[grafana]
+name=grafana
+baseurl=https://packages.grafana.com/oss/rpm-beta
+repo_gpgcheck=1
+enabled=1
+gpgcheck=1
+gpgkey=https://packages.grafana.com/gpg.key
+sslverify=1
+sslcacert=/etc/pki/tls/certs/ca-bundle.crt
+```
+
 Then install Grafana via the `yum` command.
 Then install Grafana via the `yum` command.
 
 
 ```bash
 ```bash