Add doc with default ssm paths

docs/005-default-parameter-store-locations.md

@@ -0,0 +1,9 @@
+# Default Parameter Store Locations
+
+A number of constructs from the library define parameters to get configuration from Parameter Store. Each of these parameters configures a default path. The below table lists those paths, the parameter that sets them, the value type and which construct the parameter is defined within.
+
+| Path                                  | Parameter              | Type              | Construct                |
+| ------------------------------------- | ---------------------- | ----------------- | ------------------------ |
+| /account/vpc/primary/id               | VpcId                  | AWS::EC2::VPC::Id | GuVpc.fromIdParameter    |
+| /account/services/artifact.bucket     | DistributionBucketName | String            | GuGetDistributablePolicy |
+| /account/services/logging.stream.name | LoggingStreamName      | String            | GuLogShippingPolicy      |