Remove the " around the env values.

templates/shinyproxy-2-conf.yml.j2

@@ -111,7 +111,7 @@ proxy:
 {% if app.environment is defined %}
     container-env:
 {% for env in app.environment %}
-      {{ env.name }}: "{{ env.value }}"
+      {{ env.name }}: {{ env.value }}
 {% endfor %}
 {% endif %}