Expound on caching strategies/considerations for Django and JavaScript/React

[hancush]

Documentation request

I'm just about settled on a caching strategy for the payroll site, and there were a lot of considerations for identifying the right approach:

• SEO, particularly for dynamically loaded content
• Slow in-request JavaScript compilation
• Fairly heavy database queries
• Particulars of the Django caching framework, e.g., query parameters create additional cache entries

I'd like to write a short blurb on these considerations and summarize some best practices when any/all of them come up in our Django/JavaScript hybrid projects.

Relevant PR: https://github.com/datamade/bga-payroll/pull/466

[hancush]

Worth noting that I ripped our compressor stack out of payroll because it was too slow for production. Would not use it as a model.

[hancush]

This is actually not something I feel comfortable with, and will likely be superseded by #149. Closing.