update readme

README.md

@@ -8,3 +8,19 @@ The list below shows the currently applied patches to this build.
 - dmenu-border-4.9.diff
 - dmenu-center-20200111-8cd37e1.diff
 - dmenu-password-4.9.diff
+
+## Installation
+To install this package you can run several commands.
+
+### AUR with helper
+If youre on Arch you can use the Arch User Repository.
+For simplicity you can use a AUR-helper such as yay.
+- `yay -S dmenu-tiyn-git`
+Or you can clone it and run it by makepkg.
+- `git clone https://aur.archlinux.org/dmenu-tiyn-git.git`
+- `makepkg -sirc`
+
+### MAKE
+The most basic way is to clone the repository and then invoke make.
+- `git clone https://github.com/tiyn/dmenu`
+- `make clean install`