added simple example using flask

[GiantRobato]

Added

• example on how to use folium with flask

[ocefpaf]

Awesome! Thanks @penguindustin!! This question pops up so frequently that it is a great addition to our docs. I'll leave it here for a while so @Conengmo can take a quick look at but I'm planning to merge it during the rest of the sprints.

[GiantRobato]

@ocefpaf thanks for the mentoring! I enjoyed working on the project 😊

[Conengmo]

Thanks for your PR @penguindustin! I think it's a good idea to have an example on how to use folium with Flask.

In your PR you add basically the same example in two places: in the documentation and in a Python file in our examples folder. I think it would be best to choose one those and not have a duplicate example in two places. Which do you think is better, the documentation or the example file? I'm currently leaning towards the example Python file.

[GiantRobato]

@Conengmo I reordered the index and added some extra info to the example file. Should I replicate it in the .rst? I think there's a way to reference the actual python file instead of copy pasta into the .rst but I'm no expert in Sphinx docs.

[ocefpaf]

@Conengmo I think it is nice to have it in the docs and the best course of action, to avoid the duplication of code and changes of it going stale, is to reference the example file in the rst as @penguindustin suggests. I'm looking into how to do that.

[ocefpaf]

Thanks @penguindustin!