Need help on Text Frame positioning

[salmanrf]

I want to write a text frame on top of an image, however, i cant find the details about using Text Frame in the documentation:

const coverTitle = new Paragraph({
    frame: {
      type: 'alignment',
      width: 850,
      height: 550,
      anchor: {
        horizontal: FrameAnchorType.MARGIN,
        vertical: FrameAnchorType.MARGIN,
      },
      alignment: {
        x: HorizontalPositionAlign.LEFT,
        y: VerticalPositionAlign.BOTTOM,
      },
    },
    children: [
      new TextRun({
        text: 'Technical Proposal',
        style: 'paragraphContent',
      }),
    ],
  });

unfortunately i cant use patcher since i need to generate other parts of the document as well (using Packer).

this is what i want to achieve: