Cache preview images of docs locally & Fix showing doc preview issues#6

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itowhid06 wants to merge 5 commits intocustom-oembed-providerfrom cache-preview-image

+144-33

Commits on May 5, 2020

Commits on Jun 10, 2020

Implement suggested changes
itowhid06
committed

Commits on Aug 17, 2020

Return cached URL if image is already cached
itowhid06
committed

Commits on Oct 26, 2020

fixed private files preview
abhishekfdd
committed