Adds mode 'a+' to create log file if DNE.
Adds mode 'a+' to create log file if DNE.

oceanzus/ooi-ui-services,Bobfrat/ooi-ui-services,asascience-open/ooi-ui-services,birdage/ooi-ui-services,DanielJMaher/ooi-ui-services,FBRTMaka/ooi-ui-services