Modal

- Add the `web_server` decorator, which exposes a server listening on a container port as a web endpoint.

- Allow users to write to the `Sandbox`'s `stdin` with `StreamWriter`.

python
stub.function()
def my_fn():
sandbox = stub.spawn_sandbox(
"bash",
"-c",
"while read line; do echo $line; done",
)
sandbox.stdin.write(b"foo\\n")
sandbox.stdin.write(b"bar\\n")
sandbox.stdin.write_eof()
sandbox.stdin.drain()
sandbox.wait()

- Fixed an bug where` Mount` was failing to include symbolic links.

When called from within a container, `modal.experimental.stop_fetching_inputs()` causes it to gracefully exit after the current input has been processed.

- The `wsgi_app()` decorator now uses a different backend based on `a2wsgi` that streams requests in chunks, rather than buffering the entire request body.

* Stubs/apps can now be "composed" from several smaller stubs using `stub.include(...)`. This allows more ergonomic setup of multi-file Modal apps.