[#58] Allow all origins (#63)

Signed-off-by: ruromero <[email protected]>

.github/workflows/build.yaml

@@ -17,7 +17,7 @@ jobs:
     name: "Build native images"
     steps:
       - name: Checkout
-        uses: actions/checkout@v3  
+        uses: actions/checkout@v3
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2
       - name: Set up Docker Buildx

README.md

@@ -220,4 +220,15 @@ namespace will be the current namespace.
 ./target/cloudevents-player-1.3-SNAPSHOT-runner -Dbroker.name=example -Dbroker.namespace=other
 ...
 2022-06-24 19:08:53,681 INFO  [com.git.rur.clo.ser.MessageService] (ForkJoinPool.commonPool-worker-3) Player mode KNATIVE - broker: http://broker-ingress.knative-eventing.svc.cluster.local/other/example
-```
+```
+
+## CORS
+
+By default the cloudevents player will allow all origins but it is possible to defined the allowed origins with the following environment variable:
+
+```
+  - name: QUARKUS_HTTP_CORS_ORIGINS
+    value: https://cloudevents-player-myns.apps.example.com
+```
+
+See the [Quarkus CORS documentation](https://quarkus.io/guides/http-reference#cors-filter) for more configuration parameters.