Use docker/login-action instead of docker login

Author: ruimarinho

.github/workflows/build.yaml

@@ -96,12 +96,13 @@ jobs:
           echo ::set-output name=push::${PUSH}
           echo ::set-output name=tags::${TAGS[@]}
           echo ::set-output name=build::true
+
       - if:  ${{ steps.prepare.outputs.build }} == 'true'
         name: Login into Docker Hub
-        env:
-          DOCKER_HUB_PASSWORD: ${{ secrets.DOCKER_HUB_PASSWORD }}
-        run: |
-          docker login --username "${{ steps.prepare.outputs.docker_username }}" --password ${DOCKER_HUB_PASSWORD}
+        uses: docker/login-action@v1
+        with:
+          username: ruimarinho
+          password: ${{ secrets.DOCKER_HUB_PASSWORD }}
 
       - if:  ${{ steps.prepare.outputs.build }} == 'true'
         name: Build Docker image
@@ -128,8 +129,3 @@ jobs:
             --build-arg "VCS_REF=${GITHUB_SHA::8}" \
             $(printf "%s" "${TAGS[@]/#/ --tag }" ) \
             ${{ matrix.version }}/
-
-      - if:  ${{ steps.prepare.outputs.build }} == 'true'
-        name: Clear Docker credentials
-        run: |
-          rm -f ${HOME}/.docker/config.json