portainer/app/components/registries/registries.html

<rd-header>
  <rd-header-title title="Registries">
    <a data-toggle="tooltip" title="Refresh" ui-sref="registries" ui-sref-opts="{reload: true}">
      <i class="fa fa-refresh" aria-hidden="true"></i>
    </a>
  </rd-header-title>
  <rd-header-content>Registry management</rd-header-content>
</rd-header>

<div class="row" ng-if="dockerhub">
  <div class="col-sm-12">
    <rd-widget>
      <rd-widget-header icon="fa-database" title="DockerHub">
      </rd-widget-header>
      <rd-widget-body>
        <form class="form-horizontal">
          <!-- note -->
          <div class="form-group">
            <span class="col-sm-12 text-muted small">
              The DockerHub registry can be used by any user. You can specify the credentials that will be used to push &amp; pull images here.
            </span>
          </div>
          <!-- !note -->
          <!-- authentication-checkbox -->
          <div class="form-group">
            <div class="col-sm-12">
              <label for="registry_auth" class="control-label text-left">
                Authentication
                <portainer-tooltip position="bottom" message="Enable this option if you need to specify credentials to connect to push/pull private images."></portainer-tooltip>
              </label>
              <label class="switch" style="margin-left: 20px;">
                <input type="checkbox" ng-model="dockerhub.Authentication"><i></i>
              </label>
            </div>
          </div>
          <!-- !authentication-checkbox -->
          <!-- authentication-credentials -->
          <div ng-if="dockerhub.Authentication">
            <!-- credentials-user -->
            <div class="form-group">
              <label for="hub_username" class="col-sm-3 col-lg-2 control-label text-left">Username</label>
              <div class="col-sm-9 col-lg-10">
                <input type="text" class="form-control" id="hub_username" ng-model="dockerhub.Username">
              </div>
            </div>
            <!-- !credentials-user -->
            <!-- credentials-password -->
            <div class="form-group">
              <label for="hub_password" class="col-sm-3 col-lg-2 control-label text-left">Password</label>
              <div class="col-sm-9 col-lg-10">
                <input type="password" class="form-control" id="hub_password" ng-model="dockerhub.Password">
              </div>
            </div>
            <!-- !credentials-password -->
          </div>
          <!-- !authentication-credentials -->
          <div class="form-group">
            <div class="col-sm-12">
              <button type="button" class="btn btn-primary btn-sm" ng-disabled="state.actionInProgress || dockerhub.Authentication && (!dockerhub.Username || !dockerhub.Password)" ng-click="updateDockerHub()" button-spinner="state.actionInProgress">
                <span ng-hide="state.actionInProgress">Update</span>
                <span ng-show="state.actionInProgress">Updating DockerHub settings...</span>
              </button>
            </div>
          </div>
        </form>
      </rd-widget-body>
    </rd-widget>
  </div>
</div>

<div class="row">
  <div class="col-sm-12">
    <registries-datatable
    title="Registries" title-icon="fa-database"
    dataset="registries" table-key="registries"
    order-by="Name" show-text-filter="true"
    access-management="applicationState.application.authentication"
    remove-action="removeAction"
    ></registries-datatable>
  </div>
</div>