Use geocode.city vs. algolia places

See #65

stack -> nix

Use nix for both development and deployment; build + deploy now happens in the cloud in ~5mins vs. the older local + cloud approach that took almost an hour!

Fix "chart of the moment" link

Merge pull request #57 from lfborjas/fix-chart-of-the-moment

Don't hardcode chart of the moment link

Fixes calculation of exact angles

Merge pull request #50 from lfborjas/strict-experiment

Remove naïve strictness annotations

Transits

See #36 for details!

Minor layout fixes for mobile

Hide/show some navigation elements depending on viewport size, normalize footer.

Minor layout fixes, refactor of Chart

Small layout fixes missed in #33, extract the bigger chunks of Chart.render into separate functions.

Complete re-style

Uses styles from natal-chart/firmament, plus designs from @milkmusket (<3) to make the site look less like a stingy dev created it. More solid work on accessibility and progressive enhancement to follow later on!

Soft launch: basic natal chart, https deployment

• Natal chart with full planet/houses data, basic interpretation information.
• Client-side caching for 1 day, HTTPS redirection.
• Github-Actions-based CI, with broad-strokes test coverage (golden tests for main HTML resources, request tests for routes, property tests for horoscopes.)