Revert "Delete feed.xml"

This reverts commit 4b00d1d7c7638534f5119a0afbe9f61847cc5753.
Revert "Delete params.json"

This reverts commit ebfe0b22f107964c3e44d6193a22d8b94518dc62.
Revert "Delete index.html"

This reverts commit 47f6582a55ee8596306877dd1741f5785c10b923.