Implement algolia autocomplete with rails

```js
// app/javascripts/application.js
const algoliasearch = require('algoliasearch/lite')
const autocomplete = require('autocomplete.js')

const client = algoliasearch(process.env.ALGOLIA_APPLICATION_ID, process.env.ALGOLIA_SEARCH_ONLY_API_KEY)

const pack = {
  algoliaClient: client,
  autocomplete: autocomplete
}

window.Pack = pack
```


```erb
<!-- Algolia search autocomplete HTML markup -->
<div class="aa-input-container" id="aa-input-container">
  <input type="search" id="aa-search-input" class="aa-input-search" placeholder="Search multiple fields in one place..." name="search" autocomplete="off" />
  <svg class="aa-input-icon" viewBox="654 -372 1664 1664">
    <path d="M1806,332c0-123.3-43.8-228.8-131.5-316.5C1586.8-72.2,1481.3-116,1358-116s-228.8,43.8-316.5,131.5  C953.8,103.2,910,208.7,910,332s43.8,228.8,131.5,316.5C1129.2,736.2,1234.7,780,1358,780s228.8-43.8,316.5-131.5  C1762.2,560.8,1806,455.3,1806,332z M2318,1164c0,34.7-12.7,64.7-38,90s-55.3,38-90,38c-36,0-66-12.7-90-38l-343-342  c-119.3,82.7-252.3,124-399,124c-95.3,0-186.5-18.5-273.5-55.5s-162-87-225-150s-113-138-150-225S654,427.3,654,332  s18.5-186.5,55.5-273.5s87-162,150-225s138-113,225-150S1262.7-372,1358-372s186.5,18.5,273.5,55.5s162,87,225,150s113,138,150,225  S2062,236.7,2062,332c0,146.7-41.3,279.7-124,399l343,343C2305.7,1098.7,2318,1128.7,2318,1164z" />
  </svg>
</div>

<!-- Initialize autocomplete menu -->
<script>
  var index = Pack.algoliaClient.initIndex('<%= index_name %>');
  Pack.autocomplete('#aa-search-input',
  { hint: false }, {
    source: Pack.autocomplete.sources.hits(index, {hitsPerPage: 5, filters: 'discarded_at_i < 1'}),
    displayKey: 'name',
    templates: {
      suggestion: function(suggestion) {
        return `<a href='<%= path_prefix %>/${suggestion.objectID}'>${suggestion._highlightResult.name.value}</a>`
      }
    }
  }).on("autocomplete:selected", function (event, suggestion, dataset) {
    window.location.href = `<%= path_prefix %>/${suggestion.objectID}`;
  })
</script>

```