Add a Spring Boot example and integration code.

Change-Id: Ia11dea607c74d9b4cc9a698e9ec92e930bd03f37
diff --git a/examples/spring-boot/src/main/resources/logging.properties b/examples/spring-boot/src/main/resources/logging.properties
new file mode 100644
index 0000000..e80e0c6
--- /dev/null
+++ b/examples/spring-boot/src/main/resources/logging.properties
@@ -0,0 +1,2 @@
+handlers = eu.mulk.quarkus.googlecloud.jsonlogging.logmanager.DefaultConsoleHandler
+.level = INFO