docs: manual download

docs/abra/upgrade.md

@@ -16,6 +16,29 @@ abra upgrade
 abra upgrade --rc
 ```
 
+### Manually
+
+You can also download a release manually. Go to the [releases
+page](https://git.coopcloud.tech/toolshed/abra/releases) Then, download the
+binary and untar it. For example, for release candidate `0.10.0-rc1-beta` and
+`linux_amd64`.
+
+```
+wget https://git.coopcloud.tech/toolshed/abra/releases/download/0.10.0-rc1-beta/abra_0.10.0-rc1-beta_linux_amd64.tar.gz
+```
+
+Untar the release.
+
+```
+tar -xvf abra_0.10.0-rc1-beta_linux_amd64.tar.gz
+```
+
+And test things work.
+
+```
+./abra -v
+```
+
 ## Migration guides
 
 > General release notes are [here](https://git.coopcloud.tech/toolshed/abra/releases/)