feat: Split up server creation and request handling

This allows us to decouple the WebSocket listening from the HTTP configs,
making these features completely orthogonal.

src/init/ServerInitializer.ts

@@ -1,5 +1,8 @@
 import type { Server } from 'http';
+import { URL } from 'url';
 import { promisify } from 'util';
+import { getLoggerFor } from '../logging/LogUtil';
+import { isHttpsServer } from '../server/HttpServerFactory';
 import type { HttpServerFactory } from '../server/HttpServerFactory';
 import type { Finalizable } from './final/Finalizable';
 import { Initializer } from './Initializer';
@@ -8,6 +11,8 @@ import { Initializer } from './Initializer';
  * Creates and starts an HTTP server.
  */
 export class ServerInitializer extends Initializer implements Finalizable {
+  protected readonly logger = getLoggerFor(this);
+
   private readonly serverFactory: HttpServerFactory;
   private readonly port: number;
 
@@ -20,7 +25,11 @@ export class ServerInitializer extends Initializer implements Finalizable {
   }
 
   public async handle(): Promise<void> {
-    this.server = this.serverFactory.startServer(this.port);
+    this.server = await this.serverFactory.createServer();
+
+    const url = new URL(`http${isHttpsServer(this.server) ? 's' : ''}://localhost:${this.port}/`).href;
+    this.logger.info(`Listening to server at ${url}`);
+    this.server.listen(this.port);
   }
 
   public async finalize(): Promise<void> {