title: triyng run the crawler with docker image
body: <p>I'm triyng run the crawler with docker image, but it's returning this error.</p>
  <pre><code>PS C:\Users\Santosgab\Desktop\documentation&gt; docker run -it --env-file=.env -e &quot;CONFIG=$(cat config.json | jq -r tostring)&quot; algolia/docsearch-scraper
  Traceback (most recent call last):
    File &quot;/root/src/config/config_loader.py&quot;, line 101, in _load_config
      data = json.loads(config, object_pairs_hook=OrderedDict)
    File &quot;/usr/lib/python3.6/json/__init__.py&quot;, line 367, in loads
      return cls(**kw).decode(s)
    File &quot;/usr/lib/python3.6/json/decoder.py&quot;, line 339, in decode
      obj, end = self.raw_decode(s, idx=_w(s, 0).end())
    File &quot;/usr/lib/python3.6/json/decoder.py&quot;, line 355, in raw_decode
      obj, end = self.scan_once(s, idx)
  json.decoder.JSONDecodeError: Expecting property name enclosed in double quotes: line 1 column 2 (char 1)
  </code></pre>
  <p>i used the config provided by Algolia, just made some small changes to run in my project, my config.json has no problem.</p>
  <pre><code>{
    &quot;index_name&quot;: &quot;Sequor&quot;,
    &quot;sitemap_urls&quot;: [&quot;http://localhost:3000/sitemap.xml&quot;],
    &quot;sitemap_alternate_links&quot;: true,
    &quot;stop_urls&quot;: [&quot;/tests&quot;],
    &quot;selectors&quot;: {
      &quot;lvl0&quot;: {
        &quot;selector&quot;: &quot;(//ul[contains(@class,'menu__list')]//a[contains(@class, 'menu__link menu__link--sublist menu__link--active')]/text() | //nav[contains(@class, 'navbar')]//a[contains(@class, 'navbar__link--active')]/text())[last()]&quot;,
        &quot;type&quot;: &quot;xpath&quot;,
        &quot;global&quot;: true,
        &quot;default_value&quot;: &quot;Documentation&quot;
      },
      &quot;lvl1&quot;: &quot;header h1&quot;,
      &quot;lvl2&quot;: &quot;article h2&quot;,
      &quot;lvl3&quot;: &quot;article h3&quot;,
      &quot;lvl4&quot;: &quot;article h4&quot;,
      &quot;lvl5&quot;: &quot;article h5, article td:first-child&quot;,
      &quot;lvl6&quot;: &quot;article h6&quot;,
      &quot;text&quot;: &quot;article p, article li, article td:last-child&quot;
    },
    &quot;strip_chars&quot;: &quot; .,;:#&quot;,
    &quot;custom_settings&quot;: {
      &quot;separatorsToIndex&quot;: &quot;_&quot;,
      &quot;attributesForFaceting&quot;: [&quot;language&quot;, &quot;version&quot;, &quot;type&quot;, &quot;docusaurus_tag&quot;],
      &quot;attributesToRetrieve&quot;: [
        &quot;hierarchy&quot;,
        &quot;content&quot;,
        &quot;anchor&quot;,
        &quot;url&quot;,
        &quot;url_without_anchor&quot;,
        &quot;type&quot;
      ]
    },
    &quot;conversation_id&quot;: [&quot;833762294&quot;],
    &quot;nb_hits&quot;: 46250
  }
  
  </code></pre>