Change content of website to webhook body

I want to build a website for myself, where I want to collect data shown in bulletpoints. No input, no fancy design, just:

* String 1
* String 2
* ...

But I want the site to update itself automatically, when I send data to the website through POST requests. E.g. when I send "String 3" as a body to localhost:port/add I want the webpage to reload in my browser.

Is this possible? What languages / framweworks would you recommend to me? Currently I am looking into node.js and webhooks, but I don't know if I'm on the right track. Thank you.