Add eslint rule: max line length (80)

Signed-off-by: Fred Boniface <fred@fjla.uk>

src/middlewares/auth.middlewares.js

@@ -15,7 +15,8 @@ module.exports = async function authCheck(req, res, next) {
     if (!result) {
       const err = new Error('Unauthorised');
       err.status = 401;
-      log.out('authMiddlewares: Authentication attempted with incorrect key', 'warn');
+      log.out('authMiddlewares: Authentication attempted with incorrect key',
+        'warn');
       return next(err);
     } else {
       log.out('authMiddlewares: User authenticated', 'dbug');