Build docker images

Author: jonatanklosko

.github/workflows/release.yml

@@ -214,9 +214,7 @@ jobs:
           spctl -a -t exec -vvv "$app_path"
 
   docker:
-    # TODO: bring back
-    # if: github.repository == 'livebook-dev/livebook'
-    if: false
+    if: github.repository == 'livebook-dev/livebook'
     name: Docker (${{ matrix.name }})
     permissions:
       contents: read