EspoCRM Lead capture and Preflight Checks.

Last week as I was trying to integrate EspoCRM's lead capture form with my website, I ran into a peculiar issue. Every time I would try to submit a form, whether filled or not, it wouldn't go through to my CRM. I kept getting a CORS Policy Error: My domain wasn't matching something called Access-Control-Allow-Origin. In my years of development, I was abstracted from CORS issues by frameworks and now it had caught up to me. Trying to diagnose the problem led me deeper and deeper into something I