Add Netlify redirect file

[apreshill]

Redirects need to go from relative to base url https://stat545.com/ and either map onto:

• bookdown chapters that exist
• if no chapters exist, go back to original source repo published via GH Pages, so https://STAT545-UBC.github.io/STAT545-UBC.github.io/

Two things need to be done (https://github.com/gracelawley/practice-bookdown):

1. Add _redirects file to root
2. Make sure travis copies that over to the output directory

[gracelawley]

Redirect rules:

• anything that is previous .html and in bookdown --> redirects to bookdown
• anything that is previous .md and in bookdown --> redirects to bookdown
• anything that is previous .html and not in bookdown --> redirects to ghpages
• any static image files (.jpg, .png) or data files (.csv, .json) that are not previous .html --> redirects to ghpages
• all else (including all .Rmd, .md files, dir folders) --> 404

Things that need to be done:

• Create a csv of html files that exists at https://stat545.com using the gh package
• Create a csv of mappings for bookdown chapter headers -> original stat545 link
• Create csv of netlify redirects mappings
  • Link up https://stat545.com links with bookdown chapters (if they exist)
  • Catch any missed deprecated content and add to the appendix
• Make _redirects file and tell travis what to do with it

Also:

• Create custom 404.html --> Custom 404.html #36
• Add redirects for happygitwithr (see PR happygitwithr redirects #34)