Add image to gallery

All images are stored in assets/countryphotos/<ISO 3166-1 alpha-2 country code>/ folder.

1. Add image in folder mentioned above and rename it to <highest_number + 1>.<image_extension>

2. Create <highest_number + 1>.json file according to schema:

   {
     "description": {
       "en": "Wallenstein Palace, seat of the Senate",
       "cs": "Valdštejnský palác, sídlo senátu"
     },
     "original_file": "WallensteinPalacePrague.jpg",
     "author": "",
     "license": "CC PD",
     "source_url": "https://commons.wikimedia.org/wiki/File:WallensteinPalacePrague.jpg"
   }

   ALWAYS fill following tags:

   • author field except cases when image is in public domain and author is not known
   • description with en for english, optionally, you can add description in your language for your language with <ISO 639-1 language code> tag.
   • original_file with original name of image
   • license with license abbreviation, usually CC followed by something, see https://process.arts.ac.uk/content/creative-commons-license-abbreviation-keys and license version. ie: CC BY 3.0
   • source_url with url to source image
   • public_domain boolean determining whether image is available under CC0 license