What to do after installing Termux from F-Droid?
First, upgrade the package base:
apt update
apt upgrade
Then install the essentials:
apt install coreutils binutils nano wget aria2 git openssh
apt install gcc(find replacement) g++ make nodejs nodejs-dev python python2 ruby gawk
And then you can roll on custom Node packages with npm:
npm install -g stylus pug coffeescript marked uglify-js
Tips: arrow keys - VolUp + WASD, Esc - VolUp + E, Ctrl - VolDown.
Happy hacking!