This image is based on Alpine 3.6 and provides OpenJDK 8 with 8.131.11-r0(JDK) version
The library used for random number generation in Sun's JVM relies on /dev/random by default for UNIX platforms. This can potentially block the Server process because on some operating systems /dev/random waits for a certain amount of "noise" to be generated on the host machine before returning a result.
That's why this image includes that setting by default allowing the use of urandom instead of random
This image uses the '/data' folder as WORKDIR