fix: 🔥 fix request problem

app/controllers/email_controller.rb

@@ -17,18 +17,18 @@ class EmailController < ApplicationController
     uri = URI('https://listmonk.bitium.agency/api/subscribers')
     begin
       # Set up the request
-      request = Net::HTTP::Post.new(uri)
+      request = Net::HTTP::Post.new(uri,{'Content-Type' => 'application/json'})
       request.basic_auth("newsletter", "7c221c667054e442")
-      request.set_form_data({
+      request.body = {
         "email": email,
         "name": "Subscriber",
         "lists": [
             3
         ]
-    })
+      }.to_json
       response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) do |http|
         http.request(request)
-      end  
+      end
     end
     return response
   end