Fix path to dev app

src/Steeltoe.Initializr.WebApp/manifest-dev.yml

@@ -1,11 +1,9 @@
----
+---
 applications:
 - name: startsteeltoe-stage
   buildpacks:
    - dotnet_core_buildpack
   memory: 1024M
-  command: cd ${HOME} && ./Steeltoe.Initializr
+  command: cd ${HOME} && ./Steeltoe.Initializr.WebApp
   env:
     ASPNETCORE_ENVIRONMENT: Production
-  services:
-