Convert backend to ESM

- About 5 years overdue
- Remove eslint, use bomejs instead

backend/logger.js

@@ -1,14 +1,18 @@
-const {Signale} = require('signale');
+import signale from "signale";
 
-module.exports = {
-	global:    new Signale({scope: 'Global   '}),
-	migrate:   new Signale({scope: 'Migrate  '}),
-	express:   new Signale({scope: 'Express  '}),
-	access:    new Signale({scope: 'Access   '}),
-	nginx:     new Signale({scope: 'Nginx    '}),
-	ssl:       new Signale({scope: 'SSL      '}),
-	certbot:   new Signale({scope: 'Certbot  '}),
-	import:    new Signale({scope: 'Importer '}),
-	setup:     new Signale({scope: 'Setup    '}),
-	ip_ranges: new Signale({scope: 'IP Ranges'})
+const opts = {
+	logLevel: "info",
 };
+
+const global = new signale.Signale({ scope: "Global   ", ...opts });
+const migrate = new signale.Signale({ scope: "Migrate  ", ...opts });
+const express = new signale.Signale({ scope: "Express  ", ...opts });
+const access = new signale.Signale({ scope: "Access   ", ...opts });
+const nginx = new signale.Signale({ scope: "Nginx    ", ...opts });
+const ssl = new signale.Signale({ scope: "SSL      ", ...opts });
+const certbot = new signale.Signale({ scope: "Certbot  ", ...opts });
+const importer = new signale.Signale({ scope: "Importer ", ...opts });
+const setup = new signale.Signale({ scope: "Setup    ", ...opts });
+const ipRanges = new signale.Signale({ scope: "IP Ranges", ...opts });
+
+export { global, migrate, express, access, nginx, ssl, certbot, importer, setup, ipRanges };