How to run and share your deep learning web app on Colab?

In my previous work, I built a deep learning model using Fastai to colorize black and white photos and built a web app prototype using Streamlit. I wish to share it with my colleagues and friends to get some feedback, so I tried to deploy the web app to AWS and Heroku. I was able to deploy my app to these cloud service providers and run it, however, the free tier accounts of them do not provide enough memory for my app, it crashed all the time. To have at least something running online, I had to make the size of the photos small, resulting in very poor quality. I do not want to spend a lot of money on upgrading the account at this early stage.