title: ionic invalid image, images dictionary should contain dataURL entries
body: <p>The error is ionic invalid image, images dictionary should contain dataURL entries, How do I fix this error. </p>
  
  <p>var docDefinition = {</p>
  
  <pre><code>  content: [
  
      { text: 'Dr. ' + this.letterObj.From, style: 'header' },
      { text: new Date().toLocaleString(), alignment: 'center' },
      { text: this.dloc, alignment:'center'},
      // { text: 'TEL: (631) 22431243  FAX:(631) 1325423', alignment: 'center'},
      { text: '__________________________________________________________', alignment: 'center'},
      { text: 'Name:', style: 'subheader' },
      this.full,
      {text: 'Rx', style: 'rx'},
  
      // { text: 'From', style: 'subheader' },
      // { text: this.letterObj.From },
  
      { image: '..assets/imgs/rx.png', width:100},
  
      { text:this.letterObj.text, style: 'story', margin:[0,20,0,20] },
  
      {
  
      }
    ]
  </code></pre>