Resize and compress images to improve load times about mapstory

[glynnis]

Resized and uploaded the following from https://mapstory.org/admin/groups/groupprofile/:

• people_group/init_breweries.jpg
• people_group/init_boundaries.jpg
• people_group/init_election.jpg
• people_group/init_languages.jpg
• people_group/init_local.jpg
• people_group/init_paleo.jpg

[glynnis]

Resized and uploaded the following from https://mapstory.org/admin/mapstory/sponsor/:

• sponsors/sponsor_dcpl.jpg
• sponsors/sponsor_erdc.jpg
• sponsors/sponsor_lf.jpg
• sponsors/sponsor_sf.jpg
• sponsors/sponsor_sn2.jpg

[glynnis]

I don't think these are ones that I'm able to replace, given that they come from outside of MapStory.

"Need image dimensions" -- not sure where these appear/need to be updated:

• static/geonode/img/missing_thumb.png Comes from GeoNode, I think?

• gravatar.com/avatar/... This is being served by Gravatar

• uploaded/customsite/mapstory_orange_logo.gif - wasn't able to compress this any further using ImageOptim.

I'm planning to meet with @emilyashley to discuss the "need dimensions" ones and confirm that this is completed.

[glynnis]

After talking with @emilyashley, she indicated that indeed the avatar from Gravatar is coming from an external source, so we won't be able to compress it ourselves.

For missing_thumb.jpg, we both searched for the image within the repo and checked for the image in GeoServer and GeoNode, but couldn't figure out where it was coming in (in order to overwrite the image with a new file that's better compressed).

Reassigning this to her so she can pick up with a deeper dive for where missing_thumb.png is stored.

[glynnis]

@emilyashley Closing this since we got the bulk of it addressed and I think there are many higher priority things that have swept in since we last looked at this. If you feel like this is still a priority or important, make a new issue please :)