fix release tag build

Author: dmitriy-lukyanchikov

.circleci/config.yml

@@ -56,7 +56,7 @@ jobs:
     - run:
         name: "building docker image"
         command: |
-          if [ -n "$CIRCLE_TAG" ]; then
+          if [[ -n "$CIRCLE_TAG" ]]; then
           	docker build --file Dockerfile -t "$DOCKER_NAMESPACE/$CIRCLE_PROJECT_REPONAME:$CIRCLE_TAG" .
           else
           	echo "Error: CIRCLE_TAG is not defined or empty"
@@ -69,9 +69,7 @@ jobs:
     - run: 
         name: "docker tag new version to be latest tag also"
         command: |
-          if [[ "$CIRCLE_TAG" =~ ^v[0-9]+(\.[0-9]+){1,2}$ ]]; then
-          	docker tag "$DOCKER_NAMESPACE/$CIRCLE_PROJECT_REPONAME:$CIRCLE_TAG" "$DOCKER_NAMESPACE/$CIRCLE_PROJECT_REPONAME:latest"
-          fi
+          docker tag "$DOCKER_NAMESPACE/$CIRCLE_PROJECT_REPONAME:$CIRCLE_TAG" "$DOCKER_NAMESPACE/$CIRCLE_PROJECT_REPONAME:latest"
     - run: 
         name: "push docker image to dockerhub with release version tag"
         command: |
@@ -99,7 +97,7 @@ workflows:
         context: af-global
         filters:
           tags:
-            only: /^v.*/
+            only: /^v[0-9]+(\.[0-9]+){1,2}$/
           branches:
             ignore: /.*/