install docker

.cloudbuild/library_generation/cloudbuild-library-generation-integration-test.yaml

@@ -30,14 +30,24 @@ steps:
   id: library-generation-build
   waitFor: ["-"]
 
-- name: python:3.13.1
+- name: ubuntu:25.04
   entrypoint: bash
   args:
     - "-c"
     - |
       apt-get update
-      apt-get -y install maven
+      apt-get -y install maven sudo ca-certificates curl
+      # Install docker, see https://docs.docker.com/engine/install/debian/#install-using-the-repository
+      sudo install -m 0755 -d /etc/apt/keyrings
+      curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc
+      chmod a+r /etc/apt/keyrings/docker.asc
+      # Add the repository to Apt sources:
+      echo \
+        "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian \
+        $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
+      sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
       apt-get -y install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
+      # Install python dependencies
       pip install --upgrade pip
       pip install --require-hashes -r hermetic_build/common/requirements.txt
       pip install hermetic_build/common