fix: force proxy usage if var available

Otherwise faraday call [find_proxy](https://rubyapi.org/3.3/o/uri/generic#method-i-find_proxy) to guess if a proxy is setup by env var. find_proxy check if the adress is local before calling the proxy by using a dns query which causes a timeout.

config/initializers/open_id_connect.rb

@@ -1,3 +1,7 @@
 OpenIDConnect.http_config do |config|
   config.response :jwt
+
+  if ENV['http_proxy'].present?
+    config.proxy = ENV['http_proxy']
+  end
 end