User Story: Update meme. Epic: #19

[Inc21]

As an authenticated user I can update my meme so that I can change image, title or tags in case I made an error while typing

Acceptance Criteria

• Acceptance Criteria 1
  • Given that I am a logged-in user When I navigate to my profile page Then I can see all my previously uploaded memes and update them if necessary.

Tasks

• Create functionality for a user to update their own memes.
• Update button should only be visible to the meme owner.
• Display django flash message if the update was successful.

Epic: #19