FirstMate's changes for - Docker file changes

[firstmatebot]

Important

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Changes Made

• Updated the Dockerfile to use Node.js version 14-alpine instead of 19-alpine.
• Introduced multi-stage builds to optimize image size and security.
• Set the environment variable PORT to 8080.
• Specified a non-root user for running the application.

Remaining Tasks

• Ensure that all application dependencies are correctly installed and functioning as expected.
• Verify that the application runs without issues under the new user context.

Double Check Before Merging

• Confirm that the multi-stage build is correctly implemented and that the final image size is optimized.
• Test the application to ensure it behaves as expected with the new configurations.