Setting WiFi up via the command line
https://www.raspberrypi.org/documentation/configuration/wireless/wireless-cli.md

How to setup Raspbian Networking
https://raspberrypi.stackexchange.com/questions/37920/how-do-i-set-up-networking-wifi-static-ip-address/37921#37921

Script to generate /etc/dhcpcd.conf for static IP on Raspbian Raspberry Pi
https://gist.github.com/RichardBronosky/1526ec6a585dab8f1fc9990234ac4ed0