docs: add instructions for running locally to readme (#24)

Author: hunterckx

README.md

@@ -1,5 +1,17 @@
 # brc-analytics
 
+## Setup
+
+Using Node.js version `20.10.0`, run `npm install` in the root directory of the repository to install dependencies.
+
+## Using the development server
+
+The app can be run for development using `npm run dev`, and accessed at `http://localhost:3000`.
+
+## Building the app locally
+
+Run `npm run build:local` to build. The built app can be run using `npm start`, and accessed at `http://localhost:3000`.
+
 # BRC Analytics Data Catalog
 
 ## Building the data source files