Method 1 : MULTI STAGE BUILD

Method 2 : DOCKER LAYER Reference : https://docs.docker.com/build/guide/layers/

Method 3 : SCRATCH IMAGE Reference : https://hub.docker.com/_/scratch/

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.