json_schema: {
      "additionalProperties": false,
      "properties": {
          "images": {
              "type": "object",
              "properties": {
                  "screenshots": {
                      "items": {
                          "type": "string",
                          "description": "PNG screen URL, preferably 1024 by 1024 pixels."
                      },
                      "type": "array"
                  },
                  "icon-large": {
                      "type": "string",
                      "description": "PNG icon URL, preferably 256 by 256 pixels."
                  },
                  "icon-small": {
                      "type": "string",
                      "description": "PNG icon URL, preferably 48 by 48 pixels."
                  },
                  "icon-medium": {
                      "type": "string",
                      "description": "PNG icon URL, preferably 128 by 128 pixels."
                  }
              },
              "additionalProperties": false
          },
          "assets": {
              "type": "object",
              "properties": {
                  "container": {
                      "type": "object",
                      "properties": {
                          "docker": {
                              "type": "object",
                              "additionalProperties": {
                                  "type": "string"
                              }
                          }
                      },
                      "additionalProperties": false
                  },
                  "uris": {
                      "type": "object",
                      "additionalProperties": {
                          "type": "string"
                      }
                  }
              },
              "additionalProperties": false
          }
      },
      "$schema": "http://json-schema.org/draft-04/schema#"
  }