0.6.0: Merge pull request #493 from datacamp/bb/remove-frontend

[CT-3600]: chore/delete assets and views folders

[Retry deployment 3] Sanitize HTML from examples code and fix errors

Re-trying deployment for the 3rd time, hope it finally works! (please)

[CT-3569] Sanitize HTML from examples code and fix errors by @ztsorojev

[Retry deployment 2] Sanitize HTML from examples code and fix errors

Re-trying deployment, hope it finally works! (please)

[CT-3569] Sanitize HTML from examples code and fix errors by @ztsorojev

[Retry deployment] Sanitize HTML from examples code and fix errors

Re-trying deployment, hope it finally works!

[CT-3569] Sanitize HTML from examples code and fix errors by @ztsorojev

Sanitize HTML from examples code and fix errors

[CT-3569] Sanitize HTML from examples code and fix errors by @ztsorojev

Sanitize HTML from examples code and fix errors

[CT-3569] Sanitize HTML from examples code and fix errors #477 by @ztsorojev

JSON search endpoint

Add JSON return option for search endpoints

Fix Mathjax rendering

Merge pull request #462 from datacamp/fix/mathjax-on-load

[LO-309] fix: typeset after async load

Small tweaks to utm params for signal footer

Merge pull request #458 from datacamp/feature/signal-updates

chore(footer): Update utm params

Update signal link in the footer CTA

In this release, we update the target for the "Start now" call-to-action in the footer to point straight into the r-programming assessment given that we allow anonymous assessments now.