Just published this new Docker-based Limesurvey howto: https://tech.oeru.org/installing-limesurvey-docker-ubuntu-1604-nginx-and-mariadb
Limesurvey is a superb #FOSS replacement for SurveyMonkey and Google Forms). If you want a mature full-featured solution, to manage your own data/questions & protect both your survey designers' and respondents' privacy, I highly recommend it.
@lightweight we use LimeSurvey at work as an on-premises alt. to surveymonkey that gives full access to results without more expensive plans. Trying to get users to remember its there rather than survey monkey is the trick.