modal: fix ImportError: Need the `dotenv` package installed.

[caffeinum]

Maybe Modal has changed their setup or something, but I had this error:

➜  developer git:(main) modal run main.py --prompt prompt.md --model=gpt-4
✓ Initialized. View app at https://modal.com/apps/ap-4ekAxLToNNvhjqJdFjtcH8
╭─────────────────────────────── Traceback (most recent call last) ────────────────────────────────╮
│ /opt/homebrew/bin/modal:8 in <module>                                                            │
│                                                                                                  │
│   7 │   sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])                         │
│ ❱ 8 │   sys.exit(main())                                                                         │
│   9                                                                                              │
│                                                                                                  │
│ /opt/homebrew/lib/python3.10/site-packages/modal/__main__.py:6 in main                           │
│                                                                                                  │
│    5 def main():                                                                                 │
│ ❱  6 │   entrypoint_cli()                                                                        │
│    7                                                                                             │
│                                                                                                  │
│ /opt/homebrew/lib/python3.10/site-packages/click/core.py:1130 in __call__                        │
│                                                                                                  │
│   1129 │   │   """Alias for :meth:`main`."""                                                     │
│ ❱ 1130 │   │   return self.main(*args, **kwargs)                                                 │
│   1131                                                                                           │
│                                                                                                  │
│ /opt/homebrew/lib/python3.10/site-packages/typer/core.py:778 in main                             │
│                                                                                                  │
│   777 │   ) -> Any:                                                                              │
│ ❱ 778 │   │   return _main(                                                                      │
│   779 │   │   │   self,                                                                          │
│                                                                                                  │
│ /opt/homebrew/lib/python3.10/site-packages/typer/core.py:216 in _main                            │
│                                                                                                  │
│   215 │   │   │   with self.make_context(prog_name, args, **extra) as ctx:                       │
│ ❱ 216 │   │   │   │   rv = self.invoke(ctx)                                                      │
│   217 │   │   │   │   if not standalone_mode:                                                    │
│                                                                                                  │
│ /opt/homebrew/lib/python3.10/site-packages/click/core.py:1657 in invoke                          │
│                                                                                                  │
│   1656 │   │   │   │   with sub_ctx:                                                             │
│ ❱ 1657 │   │   │   │   │   return _process_result(sub_ctx.command.invoke(sub_ctx))               │
│   1658                                                                                           │
│                                                                                                  │
│ /opt/homebrew/lib/python3.10/site-packages/click/core.py:1657 in invoke                          │
│                                                                                                  │
│   1656 │   │   │   │   with sub_ctx:                                                             │
│ ❱ 1657 │   │   │   │   │   return _process_result(sub_ctx.command.invoke(sub_ctx))               │
│   1658                                                                                           │
│                                                                                                  │
│ /opt/homebrew/lib/python3.10/site-packages/click/core.py:1404 in invoke                          │
│                                                                                                  │
│   1403 │   │   if self.callback is not None:                                                     │
│ ❱ 1404 │   │   │   return ctx.invoke(self.callback, **ctx.params)                                │
│   1405                                                                                           │
│                                                                                                  │
│ /opt/homebrew/lib/python3.10/site-packages/click/core.py:760 in invoke                           │
│                                                                                                  │
│    759 │   │   │   with ctx:                                                                     │
│ ❱  760 │   │   │   │   return __callback(*args, **kwargs)                                        │
│    761                                                                                           │
│                                                                                                  │
│ /opt/homebrew/lib/python3.10/site-packages/click/decorators.py:26 in new_func                    │
│                                                                                                  │
│    25 │   def new_func(*args, **kwargs):  # type: ignore                                         │
│ ❱  26 │   │   return f(get_current_context(), *args, **kwargs)                                   │
│    27                                                                                            │
│                                                                                                  │
│ /opt/homebrew/lib/python3.10/site-packages/modal/cli/run.py:112 in f                             │
│                                                                                                  │
│   111 │   │                                                                                      │
│ ❱ 112 │   │   with run_stub(blocking_stub, detach=ctx.obj["detach"], show_progress=ctx.obj["sh   │
│   113 │   │   │   if isasync:                                                                    │
│                                                                                                  │
│ /opt/homebrew/lib/python3.10/site-packages/synchronicity/synchronizer.py:497 in proxy_method     │
│                                                                                                  │
│ /opt/homebrew/lib/python3.10/site-packages/synchronicity/combined_types.py:26 in __call__        │
│                                                                                                  │
│ /opt/homebrew/Cellar/[email protected]/3.10.11/Frameworks/Python.framework/Versions/3.10/lib/python3.1 │
│ 0/contextlib.py:199 in __aenter__                                                                │
│                                                                                                  │
│   198 │   │   try:                                                                               │
│ ❱ 199 │   │   │   return await anext(self.gen)                                                   │
│   200 │   │   except StopAsyncIteration:                                                         │
│                                                                                                  │
│ /opt/homebrew/lib/python3.10/site-packages/modal/runner.py:64 in _run_stub                       │
│                                                                                                  │
│    63 │   │   │   # Create all members                                                           │
│ ❱  64 │   │   │   await app._create_all_objects(stub._blueprint, output_mgr, post_init_state)    │
│    65                                                                                            │
│                                                                                                  │
│ /opt/homebrew/lib/python3.10/site-packages/modal/app.py:100 in _create_all_objects               │
│                                                                                                  │
│    99 │   │   │   │   existing_object_id = self._tag_to_existing_id.get(tag)                     │
│ ❱ 100 │   │   │   │   created_obj = await resolver.load(provider, existing_object_id)            │
│   101 │   │   │   │   self._tag_to_object[tag] = created_obj                                     │
│                                                                                                  │
│ /opt/homebrew/lib/python3.10/site-packages/modal/_resolver.py:81 in load                         │
│                                                                                                  │
│    80 │   │                                                                                      │
│ ❱  81 │   │   created_obj = await obj._load(self, existing_object_id)                            │
│    82                                                                                            │
│                                                                                                  │
│ /opt/homebrew/lib/python3.10/site-packages/modal/functions.py:976 in _load                       │
│                                                                                                  │
│    975 │   │   │   for secret in secrets:                                                        │
│ ❱  976 │   │   │   │   secret_id = (await resolver.load(secret)).object_id                       │
│    977 │   │   │   │   secret_ids.append(secret_id)                                              │
│                                                                                                  │
│ /opt/homebrew/lib/python3.10/site-packages/modal/_resolver.py:81 in load                         │
│                                                                                                  │
│    80 │   │                                                                                      │
│ ❱  81 │   │   created_obj = await obj._load(self, existing_object_id)                            │
│    82                                                                                            │
│                                                                                                  │
│ /opt/homebrew/lib/python3.10/site-packages/modal/secret.py:102 in _load                          │
│                                                                                                  │
│   101 │   │   │   except ImportError:                                                            │
│ ❱ 102 │   │   │   │   raise ImportError(                                                         │
│   103 │   │   │   │   │   "Need the `dotenv` package installed. You can install it by running    │
╰──────────────────────────────────────────────────────────────────────────────────────────────────╯
ImportError: Need the `dotenv` package installed. You can install it by running `pip install python-dotenv`.