Allow API Gateway to pipe file data with correct name instead of uuid

[evanugarte]

On website/src/ApiFunctions/ApiHandler.js:26, we have to explicitly set the file name and make the handleDownload function take a parameter so we can download the file with the correct name. Instead, lets have the API gateway respond with the correct file name when taking in a uuid at the /download endpoint.

[evanugarte]

try https://stackoverflow.com/a/32139857

[evanugarte]

Game Plan

1. in lft::MongoDbHandler, add a function to find the name of a file given its id.
2. In lft::HttpServer, change the LogDownload to instead return JSON with the following format:

{ "download_count": 10, "file_name": "idk.pdf" }

3. With the new JSON response from the API, use the above comment's approach for piping the file name back to the frontend.

[evanugarte]

Use fs write streams? google search, stackoverflow, another fs example,