Update ObjectStorage example (#4919)

.config/example.yml

@@ -55,6 +55,7 @@ drive:
 
 # OR
 
+#drive:
 #  storage: 'minio'
 #  bucket:
 #  prefix:
@@ -65,25 +66,38 @@ drive:
 #    accessKey:
 #    secretKey:
 
-  # S3 example
+# S3/GCS example
+#
+# * Replace <endpoint> to
+#     S3: see https://docs.aws.amazon.com/general/latest/gr/rande.html#s3_region
+#     GCS: use 'storage.googleapis.com'
+#
+# * Replace <region> to
+#     S3: see https://docs.aws.amazon.com/general/latest/gr/rande.html#s3_region
+#     GCS: not needed (just delete the region line)
+#
+#drive:
 #  storage: 'minio'
 #  bucket: bucket-name
 #  prefix: files
+#  baseUrl: https://bucket-name.<endpoint>
 #  config:
-  #   endPoint: s3-us-west-2.amazonaws.com
-  #   region: us-west-2
+#    endPoint: <endpoint>
+#    region: <region>
 #    useSSL: true
 #    accessKey: XXX
 #    secretKey: YYY
 
-  # S3 example (with CDN, custom domain)
+# S3/GCS example (with CDN, custom domain)
+#
+#drive:
 #  storage: 'minio'
 #  bucket: drive.example.com
 #  prefix: files
 #  baseUrl: https://drive.example.com
 #  config:
-  #   endPoint: s3-us-west-2.amazonaws.com
-  #   region: us-west-2
+#    endPoint: <endpoint>
+#    region: <region>
 #    useSSL: true
 #    accessKey: XXX
 #    secretKey: YYY