L2SS-685: Add datasource for Alerta ReST API

docker-compose/grafana/datasources/alertaui.yaml

+apiVersion: 1
+
+datasources:
+  # <string, required> name of the datasource. Required
+  - name: Alerta UI
+    # <string, required> datasource type. Required
+    type: yesoreyeram-infinity-datasource
+    # <string, required> access mode. proxy or direct (Server or Browser in the UI). Required
+    access: proxy
+    # <int> org id. will default to orgId 1 if not specified
+    orgId: 1
+    # <string> custom UID which can be used to reference this datasource in other parts of the configuration, if not specified will be generated automatically
+    uid: alertaui
+    # <string> url
+    url: http://alerta-web:8080/api
+    # <string> Deprecated, use secureJsonData.password
+    password:
+    # <string> database user, if used
+    user: postgres
+    # <string> database name, if used
+    database: hdb
+    # <bool> enable/disable basic auth
+    basicAuth: false
+    # <string> basic auth username
+    basicAuthUser:
+    # <string> Deprecated, use secureJsonData.basicAuthPassword
+    basicAuthPassword:
+    # <bool> enable/disable with credentials headers
+    withCredentials:
+    # <bool> mark as default datasource. Max one per org
+    isDefault: false
+    # <map> fields that will be converted to json and stored in jsonData
+    jsonData:
+      secureQueryName1: "api-key"
+    # <string> json object of data that will be encrypted.
+    secureJsonData:
+      secureQueryValue1: "demo-key"
+    version: 1
+    # <bool> allow users to edit datasources from the UI.
+    editable: false
+