openspace-mcp-upstream-repo-ships-64mb-non-runtime-bloat

The openspace-mcp upstream repo bundles assets/ (53MB demo GIFs), gdpval_bench/ (8.2MB benchmarks), and showcase/ (3MB example projects) — totalling 64MB with zero runtime use. There is no .dockerignore, so COPY . . in the Dockerfile bakes all of this into every image build, inflating the image from ~511MB to 632MB. Solution: add .dockerignore excluding these dirs and rebuild.