add cli command to remove empty decks

src/command-factory.ts

@@ -0,0 +1,10 @@
+import { Logger } from '@nestjs/common'
+import { CommandFactory } from 'nest-commander'
+
+import { AppModule } from './app.module'
+
+const bootstrap = async () => {
+  await CommandFactory.run(AppModule, new Logger())
+}
+
+bootstrap()