Single Server Setup

One-liner: The simplest possible architecture — one machine running everything. Great for starting out, but a single point of failure.

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📌 What Is It?

[Browser] ─── HTTP ──► [Single Server]
                          ├── Web Server (Nginx/Apache)
                          ├── App Code (Node/Python/Java)
                          └── Database (MySQL/PostgreSQL)

One machine handles everything: web serving, business logic, database.

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✅ When It's Fine

• Prototype / MVP stage
• <1,000 daily users
• Internal tool / side project
• Learning / development

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❌ Problems

Problem	Impact
SPOF	Server dies → everything down
No scaling	Can't add more machines
Resource contention	App and DB fight for CPU/RAM
Hard to update	Any deploy = full downtime

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🚀 First Step: Separate App & DB

[Browser] → [App Server] → [DB Server]

Now you can scale each independently.