- Use scissors icon instead of emoji in the title

- Changes to docker
  - Add .dockerignore to skip copping unwanted files to container
   - Use python:3.9-slim for a smaller container
   - Automatically download u2net.onx during container build
   - Use gunicorn to serve the app instead of the flask dev server

- Adding gunicorn to serve the flask app. This brings a production level server to host the app, instead of the flask dev server.

- Update Readme with notes about how to run with a container or locally

- Adding .devcontainer for Codespaces and/or locally working from WSL or a dev container.