Multistage Dockerfile Example for Flask Application

This repository demonstrates the use of a multistage Dockerfile to build and package a Flask backend application. Multistage builds are used to optimize the final Docker image size and improve security.

Table of Contents

• Introduction
• Prerequisites
• Getting Started
• Usage
• Dockerfile Explanation
• Contributing
• License

Introduction

Modern application deployments often involve containerizing both the backend and frontend components. This project focuses on using a multistage Dockerfile to efficiently build a Flask backend application, creating a lightweight and secure Docker image.

Prerequisites

• Docker: You need to have Docker installed on your machine. Visit Docker's official website to download and install Docker.

Getting Started

1. Clone this repository:

   git clone https://github.com/your-username/multistage-flask-app.git
   cd multistage-flask-app

2. Build the Docker image:

   docker build -t my-flask-app .

Usage

1. Run the Docker container:

   docker run -p 5000:5000 my-flask-app

2. Access the Flask application in your web browser at http://localhost:5000.

Dockerfile Explanation

The multistage Dockerfile consists of two build stages, each optimized for a specific purpose.

Stage 1: Build the Flask Application

• Use a Python base image to build the Flask backend.
• Copy the backend source code and install dependencies.
• Build the Flask application.

Stage 2: Final Image

• Use a minimal Python base image for the final image.
• Copy the built backend from Stage 1.
• Expose the necessary port and start the Flask application.

Contributing

Contributions are welcome! If you find any issues or want to improve this project, please open an issue or submit a pull request.

License

This project is licensed under the MIT License.