fix: try to add attribution to wmts

Signed-off-by: Andrew Calcutt <acalcutt@techidiots.net>

public/templates/wmts.tmpl

@@ -778,4 +778,8 @@
     </TileMatrixSet>
   </Contents>
   <ServiceMetadataURL xlink:href="{{baseUrl}}styles/{{id}}/wmts.xml"/>
+  <Attribution>
+    <Title>{{tileJSON.attribution}}</Title>
+    <OnlineResource xlink:type="simple" xlink:href="{{baseUrl}}styles/{{id}}/wmts.xml"/>
+  </Attribution>
 </Capabilities>

src/server.js

@@ -558,6 +558,7 @@ function start(opts) {
   */
   serveTemplate('/styles/:id/wmts.xml', 'wmts', (req) => {
     const { id } = req.params;
+    const { tileJSON } = serving.rendered[id];
     const wmts = clone((serving.styles || {})[id]);
 
     if (!wmts) {
@@ -582,6 +583,7 @@ function start(opts) {
     return {
       ...wmts,
       id,
+      tileJSON,
       name: (serving.styles[id] || serving.rendered[id]).name,
       baseUrl,
     };