- compose.yml: pass STREAMLIT_SERVER_BASE_URL_PATH from .env into container
Streamlit prefixes all asset URLs with the path so Caddy handle_path routing works.
Without this, /static/* requests skip the /peregrine* route → 503 text/plain MIME error.
- config/server.yaml.example: document base_url_path + server_port settings
- .gitignore: ignore config/server.yaml (local gitignored instance of server.yaml.example)
- app/pages/2_Settings.py: add Deployment/Server expander under System tab
Shows active base URL path from env; saves edits to config/server.yaml + .env;
prompts user to run ./manage.sh restart to apply.
Refs: https://docs.streamlit.io/develop/api-reference/configuration/config.toml#server.baseUrlPath
