Trying to create an Custom UI component as a plugin in appian

Hello,
I am trying to create a custom UI component that will take input the image reference, height, width and unit (px, pt, %). It will display the image in the UI with provided height width. 
I need this as it is on of my requirement. I need to set custom height width of image.
Now, How to achieve this. I had created a project like below:

custom-image-plugin/ 
├── webpack.config.js 
├── package.json
├── appian-component-plugin.xml
└── src/
        └── customImage/
                ├── ImageComponent.jsx
                └── index.js

Build this component and added to the zip file the build js and appian-component-plugin.xml and trying to deploy as plugin, but it failed. Can't find any logs why it is failed.

Help needed
1. How to achieve this?

2. Where to find the logs for the failure.