Move .deb building instructions to INSTALL.md

This fixes #1541.

INSTALL.md

@@ -23,6 +23,7 @@
         1. [Desktop Entry](#desktop-entry)
     2. [MacOS](#macos)
     3. [Cargo](#cargo)
+    4. [Debian/Ubuntu](#debianubuntu-1)
 3. [Manual Page](#manual-page)
 4. [Shell Completions](#shell-completions)
     1. [Zsh](#zsh)
@@ -212,6 +213,15 @@ If you don't want to clone the repository, you can install Alacritty directly us
 cargo install --git https://github.com/jwilm/alacritty
 ```
 
+### Debian/Ubuntu
+
+Using `cargo deb`, you can create and install a deb file.
+
+```sh
+cargo install cargo-deb
+cargo deb --install
+```
+
 ## Manual Page
 
 Installing the manual page requires the additional dependency `gzip`.

README.md

@@ -43,17 +43,6 @@ to build Alacritty from source can be found [here](INSTALL.md).
 pacman -S alacritty
 ```
 
-### Debian/Ubuntu
-
-Using `cargo deb`, you can create and install a deb file.
-
-```sh
-git clone https://github.com/jwilm/alacritty.git
-cd alacritty
-cargo install cargo-deb
-cargo deb --install
-```
-
 ### openSUSE Tumbleweed
 
 ```sh