feat(appmesh): add missing route match features

packages/@aws-cdk/aws-appmesh/README.md

@@ -298,6 +298,30 @@ router.addRoute('route-http', {
 });
 ```
 
+Add an HTTP2 route that matches based on method, scheme and header:
+
+```ts
+router.addRoute('route-http2', {
+ routeSpec: appmesh.RouteSpec.http2({
+ weightedTargets: [
+ {
+ virtualNode: node,
+ },
+ ],
+ match: {
+ prefixPath: '/path-to-app',
+ method: appmesh.HttpRouteMatchMethod.POST,
+ scheme: appmesh.HttpRouteMatchScheme.HTTPS,
+ headers: [
+ // All specified headers must match for the route to match.
+ appmesh.HeaderMatch.valueStartsWith('Content-Type', 'application/json'),
+ appmesh.HeaderMatch.valueIsNot('Content-Type', 'application/json+unsupported'),
+ ]
+ },
+ }),
+});
+```
+
 Add a single route with multiple targets and split traffic 50/50
 
 ```ts