Convert builds to multistage docker builds

[matthewgardner]

Feature Request

Description of Problem:

Using multi-stage builds in the creation of the images to optimise image sizes and start time

Potential Solutions:

Leverage multistage builds https://docs.docker.com/get-started/docker-concepts/building-images/multi-stage-builds/

[matthewgardner]

Am working on this :)

[mathieu-benoit]

Seems indeed very important for usability and adoption of this project (images too big, and build/deployment time very long). And Security Posture to improve.

Happy to continue working on this to help.

Here is what has been done so far:

• [X] ingress: https://github.com/finos/traderX/pull/240
• [X] people-service: https://github.com/finos/traderX/pull/251
• [X] reference-data and trade-feed: https://github.com/finos/traderX/pull/258
• [X] position-service: https://github.com/finos/traderX/pull/259 in continuity of what was started here: https://github.com/finos/traderX/pull/232.

So far, more than 4.5 GB have been saved with the uncompressed container images on disk. Number of CVEs with the container images has been reduced by 6K too.

Next:

• [ ] https://github.com/finos/traderX/pull/264