Update Readme (#94)

added necessary commands to change hostname afterwards or after cloning from another working status board.
added required OS-Version.
changed description for hostname changes
corrected shell script
changed typo. . -> ~

Author: Serpant4632

rpi/Readme.md

@@ -1,7 +1,7 @@
 # Run status-board on a Raspberry Pi
 
 This folder contains scripts to configure a Pi to run the status board.
-You can install a [Raspberry Pi OS Lite](https://www.raspberrypi.com/software/operating-systems/)
+You can install a [Raspberry Pi OS 32bit Lite](https://www.raspberrypi.com/software/operating-systems/) (tested with raspbian **Bullseye**)
 and use the [bootstrap.sh](bootstrap.sh) script to set it up:
 
 
@@ -12,7 +12,15 @@ See: [https://www.raspberrypi.com/software/operating-systems/](https://www.raspb
 ```shell
 sudo raspi-config
 ```
-Use username 'ssl'.
+Use username 'ssl'.   
+Use hostname 'ssl-status-board-#'.
+
+## Check architecture
+```shell
+dpkg --print-architecture
+```
+Architecture must be **armhf** cause of the used nwjs.
+
 
 ## Download and extract latest bootstrap archive
 ```shell
@@ -22,3 +30,12 @@ wget -qO- https://github.com/RoboCup-SSL/ssl-status-board/releases/latest/downlo
 ```shell
 ./ssl-status-board/bootstrap.sh
 ```
+
+## Change hostname afterwards
+Change hostname after cloning from a working SD-Card to avoid name resolution collisions with the old system.
+```shell
+sudo raspi-config # change hostname but don´t reboot
+rm -rf ~/.config/nwjs/
+rm -rf ~/.config/ssl-status-board/
+# reboot now
+```