Added installing an experimental branch

Author: JaapvanEkris

docs/installation.md

@@ -26,12 +26,34 @@ This guide roughly explains how to set up the rowing software and hardware.
 
 ### Installation of the Open Rowing Monitor
 
-Connect to the device with SSH and initiate the following command to set up all required dependencies and to install Open Rowing Monitor as an automatically starting system service:
+Connect to the device with SSH and initiate the following command to set up all required dependencies and to install OpenRowingMonitor as an automatically starting system service:
 
 ```zsh
 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/jaapvanekris/openrowingmonitor/HEAD/install/install.sh)"
 ```
 
+#### Installing alternative branches
+
+Sometimes you need some functionality that isn't released in our stable 'main' branch, so one of our developers advises you to install an experimental branch. Please do not install an experimental branches unless you known what you are doing and you are told explicitly by any of our developers, as some branches may not even be functional without warning. Installing an alternative branch can be done via:
+
+```zsh
+wget https://raw.githubusercontent.com/jaapvanekris/openrowingmonitor/HEAD/install/install.sh
+```
+
+Followed by
+
+```zsh
+sudo nano install.sh
+```
+
+Here, look for the line 
+
+```zsh
+BRANCH="main"
+```
+
+And change the name of the branch into one of your choosing.
+
 ### Check if OpenRowingMonitor runs without issue
 
 Next, check you need to do is to check the status of the Open Rowing Monitor service, which you can do with the command: