- Install sccache in builder stage of both api and indexer Dockerfiles
- Configure RUSTC_WRAPPER to use sccache
- Use Docker cache mount (--mount=type=cache,target=/sccache) to persist cache
- Reduces build time significantly on subsequent builds by caching compiled artifacts
- Requires Docker BuildKit (enabled by default in Docker 23.0+)
Note: First build will still be slow (installs sccache + populates cache)
Subsequent builds will be much faster as dependencies are cached
