add discussion of logging filters
add discussion of logging filters

Relates to legalese-io/legalese-io.github.io#99

legalese/legalese-google-app,legalese/legalese-google-app,legalese/legalese-google-app,legalese/legalese-google-app,legalese-io/legalese-google-app,legalese/legalese-google-app