feat(api): setup nestjs

src/app.module.ts

@@ -0,0 +1,15 @@
+import { Module } from "@nestjs/common";
+import { ConfigModule } from "@nestjs/config";
+import { AuthenticationModule } from "./authentication/authentication.module";
+import { DatabaseModule } from "./database/database.module";
+import { ConnectionsModule } from "./connections/connections.module";
+
+@Module({
+  imports: [
+    ConfigModule.forRoot({ isGlobal: true }),
+    DatabaseModule,
+    AuthenticationModule,
+    ConnectionsModule
+  ]
+})
+export class AppModule {}