Add note about using `url: "http://localhost:4000"` when working locally.
Add note about using `url: "http://localhost:4000"` when working locally.

Anderson-Lab/anderson-lab.github.io,codelec/codelec.github.io,emilyreese/pizza-a-week,Anderson-Lab/anderson-lab.github.io,vsivaner/research,PACO-CPU/paco-cpu,vsivaner/research,codelec/codelec.github.io,stanlazy/stanlazy.github.io,stanlazy/stanlazy.github.io,PACO-CPU/paco-cpu,vsivaner/research,edhlily/edhlily.github.io,PACO-CPU/paco-cpu,Anderson-Lab/anderson-lab.github.io,Twimlhook/twimlhook.github.io,Twimlhook/twimlhook.github.io,stanlazy/stanlazy.github.io,edhlily/edhlily.github.io,codelec/codelec.github.io,Twimlhook/twimlhook.github.io,edhlily/edhlily.github.io,Anderson-Lab/anderson-lab.github.io,Anderson-Lab/anderson-lab.github.io,emilyreese/pizza-a-week,emilyreese/pizza-a-week