Add new sandbox (#741)

* Add new sandbox files and remove temporary unavailable notice
* remove old deployment script
* adapt application properties
* restructure hawkbit-runtime
* move sandbox description.
* adapt license checks
* Introduce review findings and add new docker files
* Remove redundant profile and attribute
* Update website
* redirect to sandbox
* getting started
* Add description for docker folder and renew favicon

docs/layouts/partials/drawer.html

@@ -21,7 +21,7 @@
       {{ if (eq (trim .Site.Params.provider " " | lower) "github") | and (isset .Site.Params "repo_url") }}
         <ul class="repo">
           <li class="repo-download">
-            <a href="/hawkbit/sandbox/sandboxunavailable/" target="_blank" title="hawkBit Sandbox" data-action="sandbox">
+            <a href="https://hawkbit.eclipse.org" target="_blank" title="hawkBit Sandbox" data-action="sandbox">
               <i class="fas fa-desktop"></i> &nbsp; Sandbox
             </a>
           </li>