TT Optimize build performance

[codastream]

User story

AS A Developer, I WANT the User Service Docker image to build faster SO THAT
I can test my changes quicker, and improve overall development efficiency.

Details

User service image takes 90 sec. to build.

Try to optimize Docker images :

• no dev dependencies (compiler, linter) in final runtime image
• use a .dockerignore file
• reduce build layers : regroup RUN instructions in one when possible, reorder them putting those more susceptible to change in the end of Dockerfile

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Priority

low

Definition of done

• lower image size (before vs after)
• lower build time

Scope

• Potentially all services with Docker image

Out of scope

Subtasks

• Analysis : measure current build time and image size
• Refactor: Create/Update .dockerignore to exclude node_modules and system files.
• Refactor: Reorder Dockerfile instructions
• Testing: verify that the service still builds and communicate with others in dev and prod env
• Doc