Update docker-compose sample file to use local volume driver so data (#4937)

persists even after Minio container is stopped/deleted

docs/orchestration/docker-compose/docker-compose.yaml

@@ -4,35 +4,52 @@ version: '2'
 # minio server's web interface will be accessible on the host at port
 # 9001 through 9004.
 services:
-  minio1:
+ minio1:
-    image: minio/minio:RELEASE.2017-08-05T00-00-53Z
+  image: minio/minio
-    ports:
+  volumes:
-      - "9001:9000"
+   - data1:/data
-    environment:
+  ports:
-      MINIO_ACCESS_KEY: minio
+   - "9001:9000"
-      MINIO_SECRET_KEY: minio123
+  environment:
-    command: server http://minio1/data http://minio2/data http://minio3/data http://minio4/data
+   MINIO_ACCESS_KEY: minio
-  minio2:
+   MINIO_SECRET_KEY: minio123
-    image: minio/minio:RELEASE.2017-08-05T00-00-53Z
+  command: server http://minio1/data http://minio2/data http://minio3/data http://minio4/data 
-    ports:
+ minio2:
-      - "9002:9000"
+  image: minio/minio
-    environment:
+  volumes:
-      MINIO_ACCESS_KEY: minio
+   - data2:/data
-      MINIO_SECRET_KEY: minio123
+  ports:
-    command: server http://minio1/data http://minio2/data http://minio3/data http://minio4/data
+   - "9002:9000"
-  minio3:
+  environment:
-    image: minio/minio:RELEASE.2017-08-05T00-00-53Z
+   MINIO_ACCESS_KEY: minio
-    ports:
+   MINIO_SECRET_KEY: minio123
-      - "9003:9000"
+  command: server http://minio1/data http://minio2/data http://minio3/data http://minio4/data 
-    environment:
+ minio3:
-      MINIO_ACCESS_KEY: minio
+  image: minio/minio
-      MINIO_SECRET_KEY: minio123
+  volumes:
-    command: server http://minio1/data http://minio2/data http://minio3/data http://minio4/data
+   - data3:/data
-  minio4:
+  ports:
-    image: minio/minio:RELEASE.2017-08-05T00-00-53Z
+   - "9003:9000"
-    ports:
+  environment:
-      - "9004:9000"
+   MINIO_ACCESS_KEY: minio
-    environment:
+   MINIO_SECRET_KEY: minio123
-      MINIO_ACCESS_KEY: minio
+  command: server http://minio1/data http://minio2/data http://minio3/data http://minio4/data 
-      MINIO_SECRET_KEY: minio123
+ minio4:
-    command: server http://minio1/data http://minio2/data http://minio3/data http://minio4/data
+  image: minio/minio
+  volumes:
+   - data4:/data
+  ports:
+   - "9004:9000"
+  environment:
+   MINIO_ACCESS_KEY: minio
+   MINIO_SECRET_KEY: minio123
+  command: server http://minio1/data http://minio2/data http://minio3/data http://minio4/data 
+
+## By default this config uses default local driver,
+## For custom volumes replace with volume driver configuration.
+volumes:
+  data1:
+  data2:
+  data3:
+  data4:
+