fileUpload, imageUpload solutions

https://developer.mozilla.org/en-US/docs/Learn/HTML/Forms
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/file
https://developer.mozilla.org/en-US/docs/Learn/HTML/Forms/Sending_forms_through_JavaScript
https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS
https://developer.mozilla.org/en-US/docs/Web/API/FormData
https://developer.mozilla.org/en-US/docs/Web/API/FormData/Using_FormData_Objects
https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/Using_XMLHttpRequest#Submitting_forms_and_uploading_files
https://developer.mozilla.org/en-US/docs/Web/API/File/Using_files_from_web_applications
https://developer.mozilla.org/en-US/docs/Web/API/FileList
https://developer.mozilla.org/en-US/docs/Web/API/File

https://medium.com/@antoinegrandiere/image-upload-and-moderation-with-vue-js-and-node-js-407fb5a1e0c0

== busboy ==
https://github.com/mscdex/busboy/issues/132
https://stackoverflow.com/questions/23620319/how-to-access-express-4-req-body-object-using-busboy
https://github.com/mscdex/busboy
https://github.com/mscdex/connect-busboy