(Hopefully) Improve CI Speed

Jenkinsfile

@@ -4,7 +4,7 @@ pipeline {
         stage('Debian Bullseye') {
             agent {
                 docker {
-                    image 'debian:bullseye'
+                    image 'buildpack-deps:bullseye'
                     args '-v /var/run/docker.sock:/var/run/docker.sock'
                 }
             }

scripts/ci/simulate.sh

@@ -3,4 +3,4 @@
 set -e
 
 # Run
-docker run --rm -v "$(pwd):/data" debian:bullseye sh -c "cd /data; ./scripts/ci/run.sh"
+docker run --rm -v "$(pwd):/data" buildpack-deps:bullseye sh -c "cd /data; ./scripts/ci/run.sh"

scripts/install-dependencies.sh

@@ -20,8 +20,6 @@ sudo apt-get dist-upgrade -y
 
 # Install
 sudo apt-get install --no-install-recommends -y \
-    ca-certificates \
-    lsb-release \
     dpkg-dev \
     git \
     cmake \