Fix build: generate settings.json from env vars at runtime

settings.json is gitignored (contains token). entrypoint.sh writes it
from OUTLINE_URL / OUTLINE_TOKEN env vars on container start.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Dockerfile

@@ -18,7 +18,8 @@ RUN git config --global user.email "sync@local" && \
 
 WORKDIR /work
 
-COPY outline_sync.py webui.py settings.json ./
+COPY outline_sync.py webui.py entrypoint.sh ./
+RUN chmod +x entrypoint.sh
 
 # Initialise vault with both branches needed by outline_sync.py
 RUN git init /vault && \
@@ -31,4 +32,5 @@ RUN git init /vault && \
 
 EXPOSE 8080
 
+ENTRYPOINT ["/work/entrypoint.sh"]
 CMD ["uvicorn", "webui:app", "--host", "0.0.0.0", "--port", "8080"]