wip: suppress output

Author: Greg Bowler

php-build.bash

@@ -121,7 +121,7 @@ then
 
 fi
 
-docker build --tag "$docker_tag" --cache-from "$docker_tag" --file Dockerfile-php-build . #>> output.log 2>&1
+docker build --tag "$docker_tag" --cache-from "$docker_tag" --file Dockerfile-php-build . >> output.log 2>&1
 
 # Update the user's repository with the customised docker image, ready for the
 # next Github Actions run.