cleanup and enhance documentation

docs/architecture.md

-Copyright 2017-2019, Schlumberger
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-     http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-# Architecture
-
-## Indexer-Service Deployment
-![indexer-service](./images/indexer-service.png)
-
-## Search-Service Deployment
-![search-service](./images/search-service.png)
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