Three must have options for any java backend app

For historical reasons we need to add these three parameters to any java server application (Tomcat, SpringBoot, etc…)

# set to headless, just in case
-Djava.awt.headless=true

# ensure UTF-8 encoding by default (e.g. filenames)
-Dfile.encoding=UTF-8

# Entropy source for randomness
-Djava.security.egd=file:/dev/urandom

Explication of each of these flags deserves a separate articale, which can be easily found ;)