Add libzip-dev to fix error in Docker build
Add libzip-dev to fix error in Docker build

PHP 7.3 stopped bundling libzip so we need to install it ourselves.

Trott/ilios,dartajax/ilios,stopfstedt/ilios,ilios/ilios,stopfstedt/ilios,thecoolestguy/ilios,thecoolestguy/ilios,ilios/ilios,Trott/ilios,dartajax/ilios