1207 create a demo shell script that illustrates integration with CircleCI

.gitignore

@@ -1,2 +1,3 @@
 .idea
 public
+.env.*

create-service-and-ensure-existence.sh

@@ -0,0 +1,18 @@
+organization=$1
+application=$2
+service=$3
+
+curl -X POST "$API_ENDPOINT" \
+-u $USER_LOGIN:$USER_PASSWORD \
+-d '
+  {
+    "query": "mutation findOrCreateServiceByName ($serviceName: ServiceName!) { findOrCreateServiceByName (serviceName: $serviceName) { organizationId applicationId serviceId } }",
+    "variables": {
+        "serviceName": {
+          "organization": "'"$organization"'",
+          "application": "'"$application"'",
+          "service": "'"$service"'"
+      }
+    }
+  }
+'