fix: auth cookie expiring too early

When not set in an environment variable, `COOKIE_EXPIRES_IN` will default to `60 * 60 * 24 * 7` = 604,800s = 7 days, since the `Max-Age` cookie attribute is specified in seconds:
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie#max-agenumber

However, the `res.cookie` function takes the `maxAge` **in milliseconds**. which means that the previous amount of seconds actually meant *604.8 seconds* ~= 10 minutes. Oof.

Author: Bentroen

server/src/auth/auth.service.ts

@@ -239,7 +239,7 @@ export class AuthService {
 
     const frontEndURL = this.FRONTEND_URL;
     const domain = this.APP_DOMAIN;
-    const maxAge = parseInt(this.COOKIE_EXPIRES_IN);
+    const maxAge = parseInt(this.COOKIE_EXPIRES_IN) * 1000;
 
     res.cookie('token', token.access_token, {
       domain: domain,