Hi Aaron!
Sure - something similar was asked in this thread - the answer’s, well: we’re soon going to open source the runtime for Observable, making it possible to export a notebook and include it on another website/webpage. But that won’t include the editable notebook interface or the rest of observablehq.com - unlike Jupyter, we’re really aiming to create a community and cross-pollination of concepts and code rather than individual installations. We might eventually launch something that enables offline editing, but that’s a bit further out in the future.