start.md in codebuild-0.6.0

- old
+ new

@@ -1,6 +1,12 @@
-## Examples
+# Examples
 
     cb start # infers the name from the parent folder
     cb start stack-name # looks up project via CloudFormation stack
     cb start demo-project # looks up project via codebuild project name
 
+## Overriding Env Variables at Runtime
+
+You can override env variables at runtime with `--env-vars`. Examples:
+
+    cb start --type vpc --env-vars K1=v1 K2=v2
+    cb start --type vpc --env-vars K1=v1 K2=ssm:v2 # support for PARAMETER_STORE