Fix createMemories() to download remote images

[nickmurison]

While creating a custom config I discovered memories would not load properly if the image: value was a URL.

For example, a config YAML that is a direct copy of default.yml with a URL specified for one of the memory images like this:

memories:
  -
    image: 'https://pbs.twimg.com/media/ER-wbuRXkAQllCT?format=jpg&name=large'
    caption: 'Magn(et)ificent!'
    user: bjoernGoogle

Will result in a warning when starting up:

info: Port 3000 is available (OK)
info: Server listening on port 3000
warn: Failed to download https://pbs.twimg.com/media/ER-wbuRXkAQllCT?format=jpg&name=large (undefined)

Also, downloadToFile in createMemories looks like it was being called with the incorrect destination path, so I made it the same as in createProducts.

[bkimminich]

Thank you! 👍 ... Send me you address via email and I'll gladly send you a couple stickers after the pandemia is over! 😷