Properly load env to correct SASS syntax error
Properly load env to correct SASS syntax error

Addresses the following error state:

```
Sass::SyntaxError:
Invalid US-ASCII character "\xE2"
views/layout.slim:7:in `block in singleton class'
views/layout.slim:-2:in `instance_eval'
views/layout.slim:-2:in `singleton class'
views/layout.slim:-5:in `__tilt_47289715199820'
./lib/discovery_service/renderer/page_renderer.rb:16:in `render'
./lib/discovery_service/metadata/updater.rb:78:in `save_group_page_content'
./lib/discovery_service/metadata/updater.rb:49:in `block in save_entities'
./lib/discovery_service/metadata/updater.rb:45:in `each'
./lib/discovery_service/metadata/updater.rb:45:in `save_entities'
./lib/discovery_service/metadata/updater.rb:31:in `update'
./spec/lib/discovery_service/metadata/updater_spec.rb:34:in `run'
./spec/lib/discovery_service/metadata/updater_spec.rb:79:in `block (5 levels) in <top (required)>'

 --- Caused by: ---
 Encoding::UndefinedConversionError:
       "\xE2" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to US-ASCII
       views/layout.slim:7:in `block in singleton class'
    ```

ausaccessfed/discovery-service,ausaccessfed/discovery-service,ausaccessfed/discovery-service