Configure Docker auth in release pipeline

Signed-off-by: Tamal Saha <[email protected]>

Author: tamalsaha

.github/workflows/release.yml

@@ -33,7 +33,10 @@ jobs:
     - name: Build
       env:
         APPSCODE_ENV: prod
+        DOCKER_TOKEN: ${{ secrets.DOCKERHUB_TOKEN }}
+        USERNAME: 1gtm
       run: |
+        docker login --username ${USERNAME} --password ${DOCKER_TOKEN}
         make release
 
     - name: Release