Back button refresh / deploy refresh automation

[solderq35]

Issue

#12

• See stack overflow links in code comments for more technical details

Back Button Refresh (removed from latest commit)

• For MU kiosk's back buttons (and maybe others, need to check how browser back buttons are handled by Kioware (MU) vs Porteus OS (LINC, Valley Library))
  • If Porteus OS kiosks don't have back button, maybe add a dedicated refresh button as discussed previously
• Comparison: Check http://sustainability-kiosks.s3-website-us-west-2.amazonaws.com vs https://osu-sustainability-office.github.io/sustainability-kiosks
  • From production (https://osu-sustainability-office.github.io/sustainability-kiosks), going to any other website and clicking back button will not trigger a new request (check inspect element > network)
    • 
  • From staging (http://sustainability-kiosks.s3-website-us-west-2.amazonaws.com or local), going to any other website and clicking back button will trigger a new request
    • 

Deploy Automation Refresh

• Demo: https://i.imgur.com/cinjAbQ.mp4
• As specified in the code, this is supposed to refresh whenever the "last modified" header changes
  • Currently re-checking every 10 minutes, but you can set refreshInterval to be 20 seconds for testing
  • Fetch requests seem to always return status 200 and "last modified" (therefore that's the only header checked for in this PR). If manually visiting a website in your browser and checking Inspect Element > Network, then a return status of 304 might show "If-Modified-Since" header instead
• Based on previous testing, it is not actually necessary to change any files to get the refresh to work, just re-run the page build process.
  • 
  • 

TODO

• Further testing on any bugs etc (for quick testing, can lower refreshInterval from 10 minutes to something like 20 seconds. Make sure to have the page (http://sustainability-kiosks.s3-website-us-west-2.amazonaws.com/) open in web browser already before triggering a new deploy
• Verify this actually works on the actual kiosks or not
• Remove some of the log statements as specified by TODO code comments
• Remove hiring page from the main index (src/router/index.js) after April 14
• One of the TODO code comments about font URL prefixes can be ignored, as it is not a huge issue and can probably be moved to another PR (Fix Font issue #3)

[solderq35]

these were changed due to a type error warning

[solderq35]

Might remove the back button feature but keep the refresh on deploy feature