added API documentation

docs/4-api/1-overview.md

@@ -3,3 +3,39 @@ sidebar_position: 1
 ---
 
 # Overview
+
+For web interface
+
+## Endpoints
+
+### Auhentication
+
+#### `/login`
+
+Login using discord OAuth2
+
+#### `/logout`
+
+Logout from account
+
+#### `/auth`
+
+Discord OAuth2 callback
+
+### REST
+
+#### `/users/new`
+
+Create a new user
+
+#### `/users/find`
+
+Find a user
+
+#### `/users`
+
+List all users in the database
+
+#### `/list-servers`
+
+List all servers in the database

docs/4-api/2-setting-up.md

@@ -0,0 +1,130 @@
+---
+sidebar_position: 2
+---
+
+# Setting up
+
+This page will teach you how to set up the [Llama bot web API](https://github.com/llama-bot/llama-bot-web-api).
+
+## Steps
+
+### Pre-requirements
+
+- [Node.js](https://nodejs.org) version 14 or greater
+- Discord account
+- Google Firebase account
+
+### Discord
+
+1. Go to the [Discord Developer Portal](https://discord.com/developers/applications) and create an application. Select one if you already have it. Using the same application used by the discord bot is recommended.
+2. Go to the OAuth2 tab.
+3. Add the following redirect URIs:
+
+   - localhost for testing
+
+     - `http://localhost:5001/<project-id>/us-central1/api`
+     - `http://localhost:5001/<project-id>/us-central1/api/auth`
+
+   - http
+     - `http://us-central1-<project-id>.cloudfunctions.net/api`
+     - `http://us-central1-<project-id>.cloudfunctions.net/api/auth`
+   - https
+     - `https://us-central1-<project-id>.cloudfunctions.net/api`
+     - `https://us-central1-<project-id>.cloudfunctions.net/api/auth`
+
+### Firebase
+
+- must be the same project that the llama bot is using
+
+1.  Create a firebase project.
+
+    https://console.firebase.google.com
+
+2.  Create/Select a project. Make sure it is using the [blaze plan](https://firebase.google.com/pricing).
+3.  Go to the `Authentication` tab and enable `Email/Password` Authentication.
+4.  Go to the `Firestore Database` tab and enable it (using production mode is highly recommended).
+
+### Local
+
+1. Clone the [llama-bot-web-api](https://github.com/llama-bot/llama-bot-web-api) repository
+
+   Using HTTPS
+
+   ```bash
+   git clone https://github.com/llama-bot/llama-bot-web-api.git
+   ```
+
+   Using SSH:
+
+   ```bash
+   git clone git@github.com:llama-bot/llama-bot-web-api.git
+   ```
+
+2. Create `functions/src/config.json` and fill in the data.
+
+   ```json title="functions/src/config.json"
+   {
+     "region": "FIREBASE_FUNCTIONS_REGION_HERE", // Region where firebase functions is hosted in. Example: us-central1
+     "scopes": ["DISCORD", "SCOPES", "HERE"] // Discord OAuth2 scopes. Example: ["identify", "email"]
+   }
+   ```
+
+3. Create `functions/src/secret.json` and fill in the data.
+
+   ```json title="functions/src/secret.json"
+   {
+     "projectID": "FIREBASE_PROJECT_ID_HERE", // Firebase project ID
+     "clientID": "DISCORD_CLIENT_ID_HERE", // Discord OAuth2 Client ID
+     "clientSecret": "DISCORD_CLIENT_SECRET_HERE", // Discord OAuth2 Client Secret
+     "secret": "SECRET_COOKIE_KEY_HERE" // secret to be used for express session
+   }
+   ```
+
+4. Install firebase cli tools.
+
+   ```bash
+   npm install -g firebase-tools
+   ```
+
+5. Select firebase project
+
+   ```bash
+   firebase use <firebase-project-id>
+   ```
+
+6. Go to `functions` directory and install necessary dependencies.
+
+   ```bash
+   npm install
+   ```
+
+## Testing
+
+1. Start local test server by running the following command:
+   ```bash
+   npm run serve
+   ```
+2. Open locally served API and log in with your discord account.
+
+   :::warning
+   HTTP**S** won't work when serving locally. Use HTTP instead.
+   :::
+
+   Login test URI: `http://localhost:5001/<FIREBASE-PROJECT-ID>/us-central1/api/login`
+
+3. If everything is set up correctly, this should have added a new user that you can check it in the firebase `Authentication` tab.
+
+### Deploying
+
+Deploying the functions to production is as simple as running the following command:
+
+```bash
+firebase deploy
+```
+
+Production API URI: `https://us-central1-<firebase-project-id>.cloudfunctions.net/api`.
+
+## More info
+
+- discord developers documentation: https://discord.com/developers/docs
+- firebase admin sdk documentation: https://firebase.google.com/docs