Created Common Issues (markdown)

Common-Issues.md

@@ -0,0 +1,36 @@
+# Common Issues
+
+## Failed to install on Steam deck
+
+If you failed to install the launcher on your Steam deck with the command provided in the readme, you're in the right place.  
+SteamOS can't compile the launcher because some dependecies are missing from OS, in this case you have two solution to fix this issue :
+1. Find and install every package you need in order to compile the launcher with the error provided by the compiler  
+or
+2. You can use the script we made to compile the launcher with a different environment
+
+we will chose the second options here, I will not enter on the detail during this tutorial because it's just for troubleshooting.
+
+***
+
+First you need to disable read only mode of SteamOS (we will renable it afterward) :
+```bash
+sudo steamos-readonly disable
+```
+
+Then if it's not already done, install Rust :
+```bash
+sudo pacman -S rust
+```
+
+You can then renable read only mode :
+```bash
+sudo steamos-readonly enable
+```
+
+You can then run the script we made by doing :
+```bash
+bash <(curl -s https://raw.githubusercontent.com/ALEZ-DEV/Babylonia-terminal/master/build.sh)
+```
+
+### !! Important !!
+the script will ask you if you are on steam deck or not, please enter `y`