Add HTTP, SSE, and server hosting

src/app.ts

@@ -2,6 +2,8 @@ import { Config } from './services/config.ts';
 import { Database, MigrationService } from './services/storage/index.ts';
 import { Broadcaster } from './services/broadcaster.ts';
 import { ApplicationRouter } from './services/router.ts';
+import { HttpTransportRouter } from './services/transport/http-transport.ts';
+import { ServerHost } from './services/server-host.ts';
 import { Logger } from './utils/logger.ts';
 
 /** Application composition root. */
@@ -28,22 +30,32 @@ export class App {
         // before any client can connect.
         const router = await ApplicationRouter.create(routes);
 
-        return new App(database, broadcaster, router);
+        const http = new HttpTransportRouter(router, debug);
+        const host = new ServerHost(config, debug, [http]);
+
+        return new App(host, database);
     }
 
     private stopPromise: Promise<void> | undefined;
 
     constructor(
+        private readonly host: ServerHost,
         private readonly database: Database,
-        private readonly broadcaster: Broadcaster,
-        private readonly router: ApplicationRouter,
     ) {}
 
-    async start(): Promise<void> {}
+    async start(): Promise<void> {
+        await this.host.start();
+    }
 
     /** Stop transports before releasing the database they may still use. */
     async stop(): Promise<void> {
-        this.stopPromise ??= this.database.destroy();
+        this.stopPromise ??= (async (): Promise<void> => {
+            try {
+                await this.host.stop();
+            } finally {
+                await this.database.destroy();
+            }
+        })();
         await this.stopPromise;
     }
 }