quay/static/tutorial/create-image.html

<div class="alert alert-info">
   <div class="control-group">
    <label class="control-label" for="containerId">Enter a repository name:</label>
    <div class="form-inline">
      <form name="repoNameForm">
        <input type="text" id="repoName" name="repoName" class="form-control"
               ng-model="tour.tourScope.repoName" ng-pattern="/^[a-z0-9_-]+$/">
      </form>
    </div>
    <span ng-show="!repoNameForm.repoName.$valid" style="margin-left: 10px; margin-top: 7px;">
      Repository names must match [a-z0-9_-]+
    </span>
  </div>
</div>

<p>Once a container has terminated in Docker, the next step is to <i>commit</i> the container to an image, and then <i>tag</i> that image with a relevant name so it can be saved to a repository.</p>

<p>Docker lets us do this in one step with the <i>commit</i> command. To do so, we run the <code>docker commit</code> with the container ID from the previous step and tag it to be a repository under <code>quay.io</code>.

<pre class="command">
<code ng-show="tour.tourScope.showSudo">sudo </code>docker commit <var class="var1">{{ tour.tourScope.containerId || 'containerId' }}</var> quay.io/{{ tour.tourScope.username }}/<var class="var2">{{ tour.tourScope.repoName || 'myfirstrepo' }}</var>
</pre>