Fix import order in serveronly (#3072)

To fix issue caused by #3071

In order to still fulfill the new linter rule `import/order`, I replaced
the alias with the path.

I also see two other approaches, but I opted for the simplest one here
for now.

The other approaches:
1. Also create an alias for `app`.
2. Use new `imports` (like in PR #2934), but let `_moduleAliases`
untouched to stay compatible to 3rd party modules.

**Edit**: Oh, I thought of another option:
- Add `require("module-alias/register");`

serveronly/index.js

@@ -1,5 +1,5 @@
-const Log = require("logger");
 const app = require("../js/app");
+const Log = require("../js/logger");
 
 app.start().then((config) => {
 	const bindAddress = config.address ? config.address : "localhost";