Blog Migration - Automate Markdown blog migration

[nishant-nayak]

Part 2 of Blog Content Migration. Ensure the following deliverables are met:

• Create a script that can read a Markdown file and create an entry in the Post model (created in Blog Migration - Setup Django code #154)
• Run this script for all blog posts in the blog repo
• Dump all the loaded data into a JSON for loading on the production host

Note that the script must achieve the following:

• Parse the metadata from the header of the blog post. This means capturing the title, date of publish, description, tags, categories and author info (also see authors.yml). Ensure that edge cases are covered (in case some blogs have incomplete metadata)
• Code blocks, HTML blocks, etc. are handled correctly
• Images referenced in the blogs need to be transferred to the Corpus static files directory. All the links in the markdown file need to be correctly replaced with their static tag link.