UI Refresh

The UI of Goldilocks has been completely refreshed with cleaner, more accessible CSS/HTML/Javascript. A huge shout-out to @littlelark for a ton of great work on these changes.

Full Changelog

0bc68c0 Add zero-state messaging for empty recommendations and namespaces (#228)
7be9cee Bump sigs.k8s.io/controller-runtime from 0.6.2 to 0.6.3 (#229)
681b913 Fix typo shoul -> should (#237)
67f7626 Bump github.com/spf13/cobra from 1.0.0 to 1.1.1 (#238)
6666e59 Bump golang from 1.15.2 to 1.15.3 (#239)
e4c3305 Bump alpine from 3.12.0 to 3.12.1 (#244)
11e785e Bump golang from 1.15.3 to 1.15.4 (#246)
3ae2d05 Bump golang from 1.15.4 to 1.15.5 (#251)
df4e037 Bump golang from 1.15.5 to 1.15.6 (#254)
cdd6b99 Bump alpine from 3.12.1 to 3.12.2 (#260)
244023d Bump github.com/gobuffalo/packr/v2 from 2.8.0 to 2.8.1 (#248)
12ef39e Bump alpine from 3.12.2 to 3.12.3 (#265)
b23ff56 Update README.md (#261)
b23fdf1 UI Refactor. Remove non-functioning base-path arg from dashboard. (#235)