Pass metadata to the zip file server

[ddelpiano]

The UI will have to provide some metadata extracted from the geppetto model through the REST call to generate the zip file.

We will need:

• a place where to provide the text in the REST call (there might be multiple texts to be included, e.g. per instance in the geppetto model).
• an example of the json to send through the rest call.

[jrmartin]

@ddelpiano @Robbie1977 Where are we making the REST call to generate the zip file?

[Robbie1977]

POST:
https://zip.virtualflybrain.org/download
example body:

{
  "entries": [
    {"Url":"https://v2.virtualflybrain.org/data/VFB/i/0000/0001/VFB_00101567/thumbnail.png","ZipPath":"AlignedToJRC2018U/VFB_00000001.png"},
    {"Url":"https://v2.virtualflybrain.org/data/VFB/i/0000/0002/VFB_00101567/thumbnail.png","ZipPath":"AlignedToJRC2018U/VFB_00000002.png"}
  ]
}