google expects plain schema-org url (#576)

* google expects plain schema-org url
https://yoast.com/json-ld/
resolves #574

* Revert "google expects plain schema-org url"

This reverts commit 7f09d4c.

* hack to replace full path for short path, because pyld requires full, search engine expects short

pygeoapi/templates/base.html

@@ -69,7 +69,8 @@
           var head = document.getElementsByTagName('head')[0];
           var jsonld_datablock = document.createElement('script');
           jsonld_datablock.type = "application/ld+json";
-          jsonld_datablock.textContent = xhr.responseText;
+          //remove full context path, because search engines don't expect it here, pyld requires it.
+          jsonld_datablock.textContent = xhr.responseText.replace('docs/jsonldcontext.jsonld','');
           head.appendChild(jsonld_datablock);
         }
       };