You can build an image locally as:

cd /path/to/image/dir docker build .

where /path/to/image/dir is any image sub-directory in this directory that contains a 'Dockerfile'.

To build all images on container builder, run:

./build_on_container_builder.sh

Note that your checkout needs to be on the latest deployed commit. You also need to have access to the clusterfuzz-images project.