update azure-pipelines.yml

azure-pipelines.yml

@@ -24,7 +24,7 @@ jobs:
 
 - job: DockerImage
   displayName: 'Build Docker image'
-  condition: and(and(succeeded(), eq(variables['ReleaseBranch'], variables['Build.SourceBranch'])), ne(format('{0}', variables['DockerConnection']), ''))
+  condition: and(succeeded(), eq(variables['ReleaseBranch'], variables['Build.SourceBranch']))
   dependsOn: BuildAndTest
   pool:
     vmImage: 'ubuntu-latest'
@@ -50,11 +50,17 @@ jobs:
   - script: mkdir packages && cp -a /home/vsts/.nuget/packages ./packages/
     displayName: 'copy nuget package cache for docker'
 
+  - task: Docker@2
+    displayName: 'logging into docker registry'
+    condition: succeeded()
+    inputs:
+      containerRegistry: $(DockerConnection)
+      command: 'login'
+
   - task: Docker@2
     displayName: 'building release docker image'
     condition: and(succeeded(), eq(variables['ReleaseKind'], 'release'))
     inputs:
-      containerRegistry: $(DockerConnection)
       repository: $(DockerRegistry)
       command: 'buildAndPush'
       Dockerfile: 'Dockerfile'
@@ -67,7 +73,6 @@ jobs:
     displayName: 'building test docker image'
     condition: and(succeeded(), not(eq(variables['ReleaseKind'], 'release')))
     inputs:
-      containerRegistry: $(DockerConnection)
       repository: $(DockerRegistry)
       command: 'buildAndPush'
       Dockerfile: 'Dockerfile'