add map and tweak responsiveness of its container

[nickvisut]

Description

Add Mapbox map to main page and . Also adds a handful of example soft stories as Mapbox markers.

Closes #72

Type of changes

• Bugfix
• Chore
• New Feature

Testing

• I added automated tests
• I think tests are unnecessary

How to test

Run app, open index page and observe that map of SF is showing. Compare to Figma design. Attempt to pan/zoom with mouse and touch across diff devices and/or browser view port sizes.

Please also refer to requirements in #72, also linked in the right panel under "Development".

[nickvisut]

@mantuok OK I polished this up, added some missing things based on your feedback, and pulled it out of draft. FYI I rebased on master, so you may need to clear out this branch locally to get the new version.

Furthermore, note that I adopted your naming convention for the mapbox token, so you can get rid of the other one locally if you still see it there.

[nickvisut]

@mantuok OK I polished this up, added some missing things based on your feedback, and pulled it out of draft. FYI I rebased on master, so you may need to clear out this branch locally to get the new version.

Furthermore, note that I adopted your naming convention for the mapbox token, so you can get rid of the other one locally if you still see it there.

FYI I just did the force push that rebases on master.

[mantuok]

Everything works and good to go!