Update build.yml

Author: pauldotknopf

.github/workflows/build.yml

@@ -18,7 +18,8 @@ jobs:
         DOCKER_LOGIN_USERNAME: ${{ secrets.DOCKER_LOGIN_USERNAME }}
         DOCKER_LOGIN_PASSWORD: ${{ secrets.DOCKER_LOGIN_PASSWORD }}
       run: |
+        sudo apt-get update
         echo '{"experimental":true}' | sudo tee /etc/docker/daemon.json
         sudo service docker restart
         sudo apt-get install -y debootstrap
-        sudo make ci LOGIN_USERNAME=$DOCKER_LOGIN_USERNAME LOGIN_PASSWORD=$DOCKER_LOGIN_PASSWORD TAG=`date +"%Y-%m-%d-%H%M%S"`
+        sudo make ci LOGIN_USERNAME=$DOCKER_LOGIN_USERNAME LOGIN_PASSWORD=$DOCKER_LOGIN_PASSWORD TAG=`date +"%Y-%m-%d-%H%M%S"`