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7/15/2026
# The Journey of a Request: How NGINX Routes Traffic Between Docker Containers in a Modern Web Application

# The Journey of a Request: How NGINX Routes Traffic Between Docker Containers in a Modern Web Application

Short summary

This is a beginner-friendly walkthrough of how NGINX acts as a reverse proxy routing traffic between Docker containers in a typical web application. It traces a request from DNS lookup through NGINX to frontend and backend containers, with ASCII diagrams and a minimal config example. The content covers standard web architecture concepts with no AI relevance.

  • •Explains NGINX reverse proxy routing for a 4-container Docker setup
  • •Traces a request from browser DNS lookup through NGINX to frontend/backend/Postgres
  • •Entry-level tutorial with ASCII diagrams and minimal NGINX config

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