Add documentation & data scripts

Add Readme.md
scripts in data/ can generate some dummy date into the system

Issue-ID: NONRTRIC-238
Signed-off-by: ecaiyanlinux <martin.c.yan@est.tech>
Change-Id: Id562c281ba909fa60e63223d8bd44f20949bb493
diff --git a/docker-compose/data/testdata/service.json b/docker-compose/data/testdata/service.json
new file mode 100644
index 0000000..1b973fc
--- /dev/null
+++ b/docker-compose/data/testdata/service.json
@@ -0,0 +1 @@
+{"callbackUrl": "http://callback-receiver:8090/callbacks/1","keepAliveIntervalSeconds": "3600","serviceName": "service1"}