pin docker image version

Author: dashpole

cloudbuild-e2e-cloud-run.yaml

@@ -13,7 +13,7 @@
 # limitations under the License.
 steps:
   # Wait for the image to exist
-  - name: "docker"
+  - name: docker:28
     id: wait-for-image
     entrypoint: "sh"
     timeout: 3m

cloudbuild-e2e-gae.yaml

@@ -13,7 +13,7 @@
 # limitations under the License.
 steps:
   # Wait for the image to exist
-  - name: "docker"
+  - name: docker:28
     id: wait-for-image
     entrypoint: "sh"
     timeout: 3m

cloudbuild-e2e-gce.yaml

@@ -13,7 +13,7 @@
 # limitations under the License.
 steps:
   # Wait for the image to exist
-  - name: "docker"
+  - name: docker:28
     id: wait-for-image
     entrypoint: "sh"
     timeout: 3m

cloudbuild-e2e-gke.yaml

@@ -13,7 +13,7 @@
 # limitations under the License.
 steps:
   # Wait for the image to exist
-  - name: "docker"
+  - name: docker:28
     id: wait-for-image
     entrypoint: "sh"
     timeout: 3m

cloudbuild-e2e-image.yaml

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 steps:
-  - name: docker
+  - name: docker:28
     entrypoint: "sh"
     args:
       - -c

cloudbuild-e2e-local.yaml

@@ -13,15 +13,15 @@
 # limitations under the License.
 steps:
   # Wait for the image to exist
-  - name: "docker"
+  - name: docker:28
     id: wait-for-image
     entrypoint: "sh"
     timeout: 3m
     env: ["_TEST_SERVER_IMAGE=${_TEST_SERVER_IMAGE}"]
     args:
       - e2e-test-server/wait-for-image.sh
 
-  - name: "docker"
+  - name: docker:28
     id: pull-image
     args:
       - pull