added support for postgres

backend/src/resources/application.yml.example

@@ -0,0 +1,16 @@
+server:
+  port: 9000
+
+spring:
+  datasource:
+    url:
+    username:
+    password:
+    driver-class-name:
+  data:
+    rest:
+      base-path: /api/v1
+
+logging:
+  level:
+    root: DEBUG