- specify debian packages to put on filesystem before other buildpacks run
- we specify
gnupg2because we need it forblackboxto work properly - see: https://github.com/StackExchange/blackbox/issues/240
- this works for Heroku16 (which is just ubuntu 16.4)
- if we upgrade ubuntu versions we will need to use a different .deb
- (but hopefully new versions will just ship w/ gpg versions >= 2.0?)
- find new versinos of
gnupg2here: https://packages.ubuntu.com/search?keywords=gnupg2