V0.3 (#7)

* Upload images and bboxes to s3. Refactor.

* Remove comment.

* Add boto3 to requirements.txt

* Try to deploy on Heroku.

Procfile

@@ -0,0 +1 @@
+web: sh setup.sh && streamlit run app.py

setup.sh

@@ -0,0 +1,8 @@
+mkdir -p ~/.streamlit/
+echo "\
+[server]\n\
+headless = true\n\
+port = $PORT\n\
+enableCORS = false\n\
+\n\
+" > ~/.streamlit/config.toml