Test script on Ubuntu and Debian

.gitlab-ci.yml

@@ -9,7 +9,10 @@ variables:
 
 test-install-script:
   stage: test
-  image: debian:10
+  image: $TEST_IMAGE
+  parallel:
+    matrix:
+      - TEST_IMAGE: ["debian:10", "ubuntu:bionic", "ubuntu:focal", "ubuntu:jammy"]
   interruptible: true
   before_script:
     - apt-get update && apt-get install -y curl