Updated pipelines with new Docker installer task.

Author: winromulus

.devops/pipelines/jobs.ci.build.docker.yaml

@@ -22,38 +22,14 @@ jobs:
       - ${{ if eq(parameters.arch, 'arm64') }}:
         - Agent.OSArchitecture -equals ARM64
   variables:
-  - ${{ if eq(parameters.arch, 'amd64') }}:
-    - name: Docker.CLI.Architecture
-      value: amd64
-  - ${{ if eq(parameters.arch, 'arm64') }}:
-    - name: Docker.CLI.Architecture
-      value: arm64
-  - ${{ if eq(parameters.arch, 'arm') }}:
-    - name: Docker.CLI.Architecture
-      value: armhf
   - name: Docker.Image.Architecture
     value: ${{ parameters.arch }}
 
   steps:
-  - script: |
-      docker version
-      if [ "$?" -ne "0" ]; then
-        apt-get update
-        apt-get install \
-         apt-transport-https \
-         ca-certificates \
-         curl \
-         gnupg2 \
-         software-properties-common
-        curl -fsSL https://download.docker.com/linux/ubuntu/gpg | apt-key add -
-        add-apt-repository \
-         "deb [arch=$(Docker.CLI.Architecture)] https://download.docker.com/linux/ubuntu \
-         $(lsb_release -cs) \
-         stable"
-        apt-get update
-        apt-get install docker-ce docker-ce-cli containerd.io
-      fi
-    displayName: "Docker install"
+  - task: DockerInstaller@0
+    displayName: 'Docker CLI install'
+    inputs:
+      dockerVersion: '19.03.8-ce'
 
   - task: Docker@2 
     displayName: 'Build image'