diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..b4af3d0
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,81 @@
+# Contributing
+
+## Table of Contents
+
+- [Getting Started](#getting-started)
+  - [Installation](#installation)
+  - [Environment Setup](#environment-setup)
+  - [Running the Bot](#running-the-bot)
+- [Adding Commands](#adding-commands)
+- [Submitting Changes](#submitting-changes)
+
+## Getting Started
+
+### Installation
+
+If you haven't already, install [Node.js](https://nodejs.org) with a version no less than `20.11.0`.
+
+Afterwards, install `pnpm` by running `corepack enable`.
+
+[Corepack](https://nodejs.org/api/corepack.html#corepack) is a tool that manages package managers, and comes bundled with Node.js.
+
+Then, install the needed dependencies with `pnpm install --frozen-lockfile`.
+
+### Environment Setup
+
+First, create an application on the [Discord Developer Portal](https://discord.com/developers/applications).
+
+It will be a used as a test application for development purposes of the bot.
+
+Then, create a `.env` file at the root of the project with the following variables obtained from the dev portal:
+
+```env
+APPLICATION_ID=
+DISCORD_TOKEN=
+PUBLIC_KEY=
+```
+
+### Running the Bot
+
+Make sure you run the `deploy-commands` script before you start! It updates the command list on Discord.
+
+You can do that by running `pnpm deploy-commands`.
+
+Once that's done, you can run the bot locally with `pnpm dev`.
+
+You need to forward the port used, and specify it in the dev portal as the interactions endpoint URL.
+
+## Adding Commands
+
+Create a new file in the `src/commands` directory, with the following structure (you can use this as a template):
+
+```ts
+import { SlashCommandBuilder } from '@discordjs/builders';
+import { type APIApplicationCommandInteraction, InteractionResponseType } from 'discord-api-types/v10';
+import { reply } from '../reply.js';
+
+export async function onXSlashCommand(interaction: APIApplicationCommandInteraction) {
+  return reply(InteractionResponseType.ChannelMessageWithSource, {
+    content: 'you just ran the test command. good job',
+  });
+}
+
+export const slashCommandData = new SlashCommandBuilder()
+  .setName('replace-me')
+  .setDescription('replace this too');
+```
+
+Rename the onXSlashCommand function to match the command name (i.e. `onTestSlashCommand` for a command named `test`),
+and replace the placeholder text in the builder.
+
+Then, import the command in `src/commands/index.ts` and add it to the switch statement in the handleInteraction function.
+
+Remember to run `pnpm deploy-commands` after adding a new command, to update the command list on Discord.
+
+## Submitting Changes
+
+When you're ready to submit your changes, make sure to run `pnpm check` and `pnpm typecheck` to ensure everything is in order.
+
+Then, create a [pull request](https://github.com/biomejs/discord-utils-bot/pulls).
+
+Once the PR is approved, it will be merged and deployed to the production bot.
diff --git a/README.md b/README.md
index 2e3de24..80c7b16 100644
--- a/README.md
+++ b/README.md
@@ -2,10 +2,6 @@
 
 Util bot for the Biome Discord server. [WIP]
 
-## Deploying
+## Contributing
 
-Make sure you run the `deploy-commands` script before deploying! It updates the command list on Discord.
-
-It needs a `.env` file at the root of the project, with `APPLICATION_ID` and `DISCORD_TOKEN` variables.
-
-When you're done running the script, go ahead and run `pnpm run deploy` to instantly deploy your changes to Cloudflare.
+Check out [`CONTRIBUTING.md`](CONTRIBUTING.md) information on how to contribute.
diff --git a/package.json b/package.json
index 77dde1d..6934330 100644
--- a/package.json
+++ b/package.json
@@ -5,14 +5,14 @@
   "type": "module",
   "license": "MIT OR Apache-2.0",
   "scripts": {
-    "format": "biome format --write .",
-    "check": "biome check .",
-    "check:apply": "biome check --apply-unsafe .",
-    "typecheck": "tsc",
+    "dev": "wrangler dev",
+    "start": "wrangler dev",
     "deploy": "wrangler deploy",
     "deploy-commands": "tsx --env-file=.env scripts/deploy-commands.ts",
-    "dev": "wrangler dev",
-    "start": "wrangler dev"
+    "check": "biome check .",
+    "check:apply": "biome check --apply-unsafe .",
+    "format": "biome format --write .",
+    "typecheck": "tsc"
   },
   "devDependencies": {
     "@biomejs/biome": "^1.7.0",
diff --git a/src/index.ts b/src/index.ts
index 8bdcdad..f8cb4a4 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -6,7 +6,7 @@ import { onTestSlashCommand } from './commands/test.js';
 import { reply } from './reply.js';
 import { isChatInputCommand, isMessageComponent, isPing } from './typeguards.js';
 export type Env = {
-  publicKey: string;
+  PUBLIC_KEY: string;
 };
 
 export default {
@@ -17,7 +17,7 @@ export default {
     }
 
     // Check if the request is valid
-    const isValid = await isValidRequest(request, env.publicKey, PlatformAlgorithm.Cloudflare).catch(() => false);
+    const isValid = await isValidRequest(request, env.PUBLIC_KEY, PlatformAlgorithm.Cloudflare).catch(() => false);
     if (!isValid) {
       return new Response('Invalid signature', { status: 401 });
     }