Quickstart for Devbox (#2525)

Summary
How was it tested?
Is this change backwards-compatible?

Author: Lagoja

README.md

@@ -2,6 +2,43 @@
 
 Devbox is a tool that lets you easily manage development environments.
 
+## Prerequisites
+* [Nix Package Manager](https://nixos.org/download.html) (Don't worry, you don't need to learn Nix)
+* [Docker](https://docs.docker.com/engine/install/)
+
+## Quickstart
+
+Initialize Devbox for your project
+```bash
+devbox init
+```
+
+Add [Nix Packages](https://search.nixos.org/packages) to your project
+```bash
+devbox add goreleaser
+```
+
+Start a local development shell with your project and packages
+```bash
+devbox shell
+```
+
+Build a Docker image of your project
+```bash
+devbox build
+```
+## Language Support
+
+Devbox can detect and automatically configure shells + Docker containers for your language. 
+
+To view the current plan for your project run: 
+```bash
+devbox plan
+```
+Currently supported languages include: 
+* Go
+
+
 ## Related Work
 
 - [nix](https://nixos.org/)