[FEAT] Organize folder structure

[effendiian]

Summarize the feature succinctly here. Organize the folder structure and break project up into proper layers.

Describe the solution you'd like Consider dealing with:

• API Route Controller
• Service Layer
• Pub/Sub Layer
• Data Access Layer
• Configuration Layer
• Loader Layer

Relevant links The following references will help:

• blog-express project by azat-co.
• Bulletproof node.js project architecture (article) and bulletproof-nodejs (repo) by santiq.

[effendiian]

Additional Resource: HackSparrow Middleware Node.js Guide OneTab List