Instagram and Mastodon bypass for IFTTT.
Exec node app.js to set your instance url or domain.
Follow the instructions and get access_token. (It will be saved as plain text, so be carefull.)
Exec node app.js again and your bypass server will be ready.
Go to IFTTT.
For +this, just select "Instagram".
For +that, choose "Maker Webhooks".
Click on "Make a web request".
Place URL for your server.
Select POST for Method.
Select "application/json" for Content Type.
For Body, it will be like this:
{"status": "{{Caption}} {{Url}}", "imageUrl": "{{SourceUrl}}"}
({{Url}} is a link to Instagram's post, so delete it if unneeded.)