* fix: restructure certifications guide articles * fix: added 3 dashes line before prob expl * fix: added 3 dashes line before hints * fix: added 3 dashes line before solutions
* Replace stub with hints and solution For "create many records" mongoDB lesson * Fix markdown for inline code Add new line to allow markdown to render inline code * Use callback in `createAndSavePerson` function * fix: corrected hints syntax