docs: Warn about non-posix default shell

docs/getting-started/installation.md

@@ -1,12 +1,22 @@
 # Installation
 
-## Prerequisites
+## Pre-built
+
+Download the latest release ([Linux](https://github.com/PaddiM8/elk/releases/download/v0.0.0/linux-x64.tar.xz), [macOS](https://github.com/PaddiM8/elk/releases/download/v0.0.0/osx-x64.tar.xz))
+and extract it into `/`:
+```bash
+tar xvf *.tar.xz -C /
+```
+
+## Manual Compilation
+
+### Prerequisites
 
 * A 64-bit Linux distro (it is possible to modify the `build.sh` file to 
 compile for other platforms, but it may not work as expected)
 * [.NET 8 SDK](https://dotnet.microsoft.com/en-us/download/dotnet/7.0)
 
-## Steps
+### Steps
 
 Start by cloning the repository:
 
@@ -28,8 +38,14 @@ Elk is now installed and can be accessed with the `elk` command.
 
 ### Default Shell
 
-The first step is to add the path to the Elk binary to `/etc/shells` in order 
-to make your system aware of the existence of the Elk shell.
+::: warning
+Setting the default shell to a non-posix shell could lead to problems.
+An alternative is to add `elk` at the end of your `.bashrc` or equivalent
+file.
+:::
+
+When making Elk the default shell, first step is to add the path to the Elk binary to `/etc/shells`.
+This makes your system aware of the existence of the shell.
 
 After the path has been added to the `/etc/shells` file, Elk can be made the 
 default shell by running the following command: