Add Environment Variables

Environment-Variables.md

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+This wiki covers the environment variables used in this application, their purposes and what values you should use.
+
+
+### Access
+
+#### `BOT_TOKEN`
+
+### Security
+
+#### `DEBUG`
+
+#### `SECRET_KEY`
+
+### Discord App
+
+#### `DISCORD_KEY`
+
+#### `DISCORD_SECRET`
+
+#### `DISCORD_OAUTH2_URL`
+
+#### `DISCORD_INVITE_URL`
+
+#### `DISCORD_REDIRECT_URL`
+
+#### `DISCORD_API_URL`
+
+### Database
+
+#### `DB_ENGINE`
+
+#### `DB_NAME`
+
+#### `DB_USER`
+
+#### `DB_PASS`
+
+#### `DB_HOST`
+
+#### `DB_PORT`
+
+### Extras
+
+#### `SUPERUSER_IDS`