Add request container lifecycle handling

src/service/HTTPServer.ts

@@ -131,6 +131,9 @@ export class HTTPServer extends Unit {
                 if ( extolloReq.response.canSend() ) {
                     await extolloReq.response.send()
                 }
+            }).finally(() => {
+                this.logging.verbose('Destroying request container...')
+                extolloReq.destroy()
             })
         }
     }