Add support for login to a registry

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b3493d82b9eef27cabb97f5bba0a6b96fb468c30..563d04b8ca6a159fee45a2532ecee6195c2660db 100644 (file)
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -13,5 +13,14 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2
+      - name: Get docker hub username
+        id: creds
+        run: echo '::set-output name=username::${{ secrets.DOCKER_PULL_USERNAME }}'
+      - name: Login to Docker Hub
+        if: steps.creds.outputs.username != ''
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKER_PULL_USERNAME }}
+          password: ${{ secrets.DOCKER_PULL_PASSWORD }}
       - name: Build image variant "${{ matrix.variants }}"
         run: cd ${{ matrix.variants }} && docker build ./