Docker images are based off debian:jessie-slim base image, and have minimal PATHs set to JDK build.
The builds are not well-tested, not virus-checked, may contain horrible bugs that could lead to data corruption, engulfing machines in flames, selling your firstborns at eBay, etc. etc. etc. everything that applies for binaries^W code^W anything downloaded from the Internet. Be cautious. If in doubt, build from source yourself, and/or run on staging environment that is not painful to restore.
THESE BUILDS ARE EXPERIMENTAL. USE WITH CARE.