run uwsgi in --lazy-apps mode to avoid SentenceTransformer warning

> huggingface/tokenizers: The current process just got forked, after
> parallelism has already been used. Disabling parallelism to avoid deadlocks

This mode instructs uWSGI to load the application one time per worker,
and will therefore prevent forking a process after SentenceTransformer
has been initialized.

See https://uwsgi-docs.readthedocs.io/en/latest/articles/TheArtOfGracefulReloading.html#preforking-vs-lazy-apps-vs-lazy

Author: jordanstephens

app/Dockerfile

@@ -49,4 +49,4 @@ RUN python test_intercom.py
 ENV FLASK_APP=app.py
 
 # Run the application using uWSGI
-CMD ["uwsgi", "--http", "0.0.0.0:5050", "--wsgi-file", "app.py", "--callable", "app", "--processes", "4", "--threads", "2"]
+CMD ["uwsgi", "--lazy-apps", "--http", "0.0.0.0:5050", "--wsgi-file", "app.py", "--callable", "app", "--processes", "4", "--threads", "2"]