build: drop build-local.sh, copy llms.txt + HTML shells into image

build-local.sh is no longer needed - bootstrap.py resolves imports
natively now. Dockerfile.stage already runs bootstrap.py on
dist/main-combined.el; the next image rev will switch to running
it directly on src/main.el.

Also: COPY src/llms.txt + the four prerendered HTML shells (about /
terms / enterprise-terms / index) into /srv/landing. The El handler
does fs_read(src_dir + "/llms.txt") which returned empty because the
file didn't exist in the container.

Dockerfile.stage

@@ -76,6 +76,10 @@ COPY --from=builder /build/soul-demo  /usr/local/bin/soul-demo
 COPY dist/engram-snapshot.json /srv/soul/engram-demo/snapshot.json
 
 COPY src/assets /srv/landing/assets
+COPY src/llms.txt /srv/landing/llms.txt
+# Pre-rendered HTML shells (about, terms, enterprise-terms, index) used as
+# fallback when the El page-builder hasn't been seeded yet at startup.
+COPY src/about.html src/terms.html src/enterprise-terms.html src/index.html /srv/landing/
 
 COPY dist/entrypoint.sh /usr/local/bin/entrypoint.sh
 RUN chmod +x /usr/local/bin/entrypoint.sh