POST to GET proxy

I made this to work around the fact that Insomnia doesn't support GraphQL APIs that work with GET queries. Kong/insomnia#1890

Instructions

• Clone the repo
• bundle install
• ruby server.rb
• If you're testing https://website.com/api/graphql, change that URL to http://localhost:4567/api/graphql in Insomnia and add the X-Forward-To: https://website.com in the request's headers

Warning

Very vulnerable to SSRF. :)