Log errors in faulty custom config file

CryptPAD now terminates and does not fallback to default config if the custom config is faulty.
The error in the custom config is logged to the terminal now.

Signed-off-by: Adrian Nöthlich <git@promasu.tech>

lib/load-config.js

@@ -8,7 +8,14 @@ try {
         console.log("You can configure the administrator email (adminEmail) in your config/config.js file");
     }
 } catch (e) {
-    console.log("Config not found, loading the example config. You can customize the configuration by copying config/config.example.js to " + configPath);
+    if (e instanceof SyntaxError) {
+        console.error("config/config.js is faulty. See stacktrace below for more information. Terminating. \n");
+        console.error(e.name + ": " + e.message);
+        console.error(e.stack.split("\n\n")[0]);
+        process.exit(1);
+    } else {
+        console.log("Config not found, loading the example config. You can customize the configuration by copying config/config.example.js to " + configPath);
+    }
     config = require("../config/config.example");
 }
 module.exports = config;