How to Redirect all 404 pages to home?

[riteshsaini]

@Jagster

But why would you like to redirect 404s back to frontpage in the first place?

I’m migrating my WordPress blog to Discourse. Now due to different link structure, there will be tons of 404 pages after the migration. I can’t set a redirect for each one of them manually, so I need a solution to do that automatically.