Deploying FastAPI with Docker (Production Setup)

 

Introduction

Building an API is only half the job the real challenge is deploying it to production.

In this blog, you’ll learn how to:

  • Containerize your FastAPI app using Docker.
  • Run it consistently across environments.
  • Prepare for production deployment.

Why Use Docker?

Docker helps you:

  • Package your app with all dependencies.
  • Run it anywhere (no “works on my machine” issues).
  • Scale easily in production.

Prerequisites

Make sure you have:

  • Docker installed
  • FastAPI project ready

Project Structure

fastapi-project/
├── app/
│   └── main.py
├── requirements.txt
└── Dockerfile

Step 1: Create requirements.txt

pip freeze > requirements.txt

Step 2: Create Dockerfile

FROM python:3.10

WORKDIR /app

COPY requirements.txt .

RUN pip install --no-cache-dir -r requirements.txt

COPY . .

CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]

Step 3: Build Docker Image

docker build -t fastapi-app .


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