airport database: http://osav-usdot.opendata.arcgis.com/datasets/a36a509eab4e43b4864fb594a35b90d6_0?filterByExtent=false&geometry=-97.201%2C47.944%2C-97.147%2C47.952
required for jQuery query-builder:
https://github.com/mistic100/jQuery.extendext.git https://github.com/olado/doT.git
setting up javascript with react/webpack/babel: https://www.valentinog.com/blog/react-webpack-babel/
#not used anymore information on using PM2 to start/restart node servers:
information on setting up apache to use PM2:
https://vedmant.com/setup-node-js-production-application-apache-multiple-virtual-host-server/
if error "service unavailabile": http://sysadminsjourney.com/content/2010/02/01/apache-modproxy-error-13permission-denied-error-rhel/
to fix:
sudo /usr/sbin/setsebool -P httpd_can_network_connect 1