Creating web front end

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Some options

• Heroku - seems to have got rid of their free tier
• AWS Lightsail
• Flask app?

Katya's app here

Guides

• Deploy a flask app on Amazon lightsail here

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Guide on using flask with lightsail here

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Up to step 4 of that guide

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An elastic beanstalk guide here - from 2020, but maybe following these answers, lightsail is a bit easier to use?

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Trying Mo's suggestions of creating the app locally then pushing it. Had to install lightsail plugin (link)

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How to serve a flask app (link)

Web visualisation with plotly and flask here

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A helpful link on resolving docker dependency issue

https://stackoverflow.com/questions/66100767/from-dockers-doc-could-not-find-a-version-that-satisfies-the-requirement-aptur

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cmake issue? https://stackoverflow.com/questions/71470989/python-setup-py-bdist-wheel-did-not-run-successfully

I think this ended up being caused by FROM python:3.8-alpine, changed to 3.8-slim-buster and it worked on the mac and ubuntu, but now not working on the pi.

[bndxn]

https://stackoverflow.com/questions/55032695/docker-build-for-numpy-pandas-giving-error and https://www.freecodecamp.org/news/how-to-dockerize-a-flask-app/

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https://stackoverflow.com/questions/52799146/docker-flask-jinja2-exceptions-templatenotfound-index-html

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https://stackoverflow.com/questions/58840929/docker-flask-jinja2-exceptions-templatenotfound-error

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Useful: https://www.digitalocean.com/community/tutorials/how-to-make-a-web-application-using-flask-in-python-3

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Lightsail seems to make it difficult to upload to an S3 bucket or change roles, so I think I'm going to try another option. Apparently static websites can be hosted with EC2.

Some googling suggested doing this with elastic beanstalk - will try that now.

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Installing docker on pi guide

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Installing elastic beanstalk? https://github.com/aws/aws-elastic-beanstalk-cli-setup

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Had issues initialising elastic beanstalk, possibly because python was old version. Looked at this (guide), and added symlink sudo ln -s /usr/local/bin/python3 python. Now Symlink issue - still exploring.

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Dealing with issues on two fronts:

1. elastic beanstalk on the pi, not able to create or list buckets
2. can't build docker image on the pi (but can on the macbook), some issue with numpy dependencies and wheel

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Uploading to S3 using flask - video here

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Another idea - streamlit https://streamlit.io/

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Flask app now deployed to Elastic beanstalk! Uploaded a zip of the file, but still!

Now improving styling: https://www.digitalocean.com/community/tutorials/how-to-make-a-web-application-using-flask-in-python-3#step-3-using-html-templates

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Tried the website format from here