fix build for now

packages/html/src/index.ts

@@ -0,0 +1,10 @@
+import { Extensions, getSchema } from '@tiptap/core'
+import { Node } from 'prosemirror-model'
+import getHTMLFromFragment from './getHTMLFromFragment'
+
+export function generateHTML(doc: object, extensions: Extensions): string {
+  const schema = getSchema(extensions)
+  const contentNode = Node.fromJSON(schema, doc)
+
+  return getHTMLFromFragment(contentNode, schema)
+}