From 1. 4., DockerHub introduces new very strict rate limitations on docker image pulls.
Consider changing FROM tags in dockerfiles to use altenative providers or add login step at the beginning of CI/CD job as authenticated requests aren't affected.
THREADS=${1:-5} USE_RAMDISK=1 CXX=g++-6 make build-code-release -j${THREADS} || exit 1 USE_RAMDISK=1 CXX=g++-6 make install-release -j${THREADS} || exit 1
