fixup docker access

Author: gionn

.github/workflows/build.yml

@@ -176,6 +176,7 @@ jobs:
             sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
           sudo apt-get update
           sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin -y
+          sudo chmod 666 /var/run/docker.sock
 
       - name: Prepare image
         run: docker build . -t buildenv --build-arg BASE_IMAGE=${{ matrix.base_image }}