Backend Prereqs Wiki Page Update

[solderq35]

General Guidelines

• If you want to add any screenshots or images to the wiki, upload the image files to website/static as best practice
• Edit Markdown files in website/docs
• Reference README for compilation / build / format scripts

Update AWS section

• https://osu-sustainability-office.github.io/docs/backend_prereqs#aws
  • Access key instructions now a bit different
  • 
  • May need to reword this section to remove reference to specific names (Jeff, Milan, etc). Like reword to "copy permissions from another existing employee" or something

Local Backend Environment

• https://osu-sustainability-office.github.io/docs/backend_prereqs#get-project-running-locally
  • Might be worth mentioning Flask dependency issues for future reference