using app_vue variable in scss file

 VUEJS 2.x

## vue.config.js

css: {

loaderOptions: {

sass: {

perpendData: `

$VAR_NAME: "

${VUE_APP_MY_VAR1}" ;

`;

}

}

}

### in scss

  att:  $VUE_APP_MY_VAR1 + "my.png"