Add new styling to code blocks

[eclectic-coding]

I am proposing editing the styles for the default Prism code blocks. In the screenshot below, you can see the default stylings create a "bar" around each link with in a code block. I have added styles in the Post.vue file to override this condition without touching the default Prismjs stylesheet:

pre {
    code {
      background-color: transparent;
      border: none;
    }
  }