title: Multiple images sizes AND formats from a single database path?
body: <p>The part about sizes is well discussed and could easily be resolved with a suffix or prefix. For example:</p>
  <p>with a single path column in database: 'images/example'</p>
  <p>I could get different image sizes with a simple string manipulation:</p>
  <ul>
  <li>'images/example-sm'</li>
  <li>'images/example-md'</li>
  <li>'images/example-lg'</li>
  </ul>
  <p>Now, how to deal with the image format? It could be webp (default) or png/jpg (the fallback). Is there anyway to implement it other than saving a column called 'fallback_format' in the database?</p>