Post custom type for documentation

post-documentation.json

{
  "Blog Post" : {
    "uid" : {
      "type" : "UID",
      "config" : {
        "placeholder" : "unique-identifier-for-blog-post-url"
      }
    },
    "body" : {
      "fieldset" : "Post content",
      "type" : "Slices",
      "config" : {
        "choices" : {
          "text" : {
            "type" : "StructuredText",
            "fieldset" : "Text",
            "config" : {
              "multi" : "paragraph, heading1, heading2, heading3, strong, em, hyperlink",
              "placeholder" : "Post text..."
            }
          },
          "quote" : {
            "type" : "StructuredText",
            "fieldset" : "Quote",
            "config" : {
              "placeholder" : "Post quote...",
              "single" : "paragraph"
            }
          },
          "image-with-caption" : {
            "type" : "Group",
            "fieldset" : "Post image and caption",
            "config" : {
              "fields" : {
                "illustration" : {
                  "type" : "Image"
                },
                "caption" : {
                  "type" : "StructuredText",
                  "config" : {
                    "single" : "heading3",
                    "placeholder" : "Image caption..."
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "Metadata" : {
    "author" : {
      "fieldset" : "Author",
      "type" : "Text"
    },
    "date" : {
      "fieldset" : "Post properties",
      "type" : "Date",
      "config" : {
        "label" : "Post date"
      }
    }
  }
}