README: mention the Debian package on the README

README.md

@@ -46,8 +46,11 @@ executable for your platform. If you are not sure what is the "right" executable
 choose:
 - `Liana.zip` if you are on MacOS,
 - `liana-1.0.exe` if you are on Windows,
-- `liana-1.0-x86_64-linux-gnu.tar.gz` if you are on Linux. Note you may have to compile the software
-  yourself if you are on Linux. See the [section below](#a-note-on-linux-binaries-and-glibc-version).
+- `liana_1.0-1_amd64.deb` if you are running a Debian-based Linux (such as Ubuntu). Use `apt install
+  ./liana_1.0-1_amd64.deb` as root (or preceded by `sudo`) to install it.
+- `liana-1.0-x86_64-linux-gnu.tar.gz` if you use another Linux distribution. Note you may have to
+  compile the software yourself if you are on Linux. See the [section
+  below](#a-note-on-linux-binaries-and-glibc-version).
 
 For every file available on the release page, there is an accompanying `.asc` file with the same
 name. This is a GPG signature made with Antoine Poinsot's key: