[rust-launcher] Use a proper templating engine for docker compose templates #2630
Description
Background
In https://github.com/near/mpc/pull/2621/changes#r2999886877 - we use plain string replacement to render docker compose templates. This makes it very easy for typos to go undetected. If we adopted a proper templating engine like Askama, any variable typo would be a compiler error.
User Story
As a developer I want the type system to help me catch typos.
Acceptance Criteria
Any typo in an injected variable in a docker compose template results in a compiler error.
Resources & Additional Notes
No response