Problem with Lab18 uaa-guard-proxy, can deploy but can't detect buildpack

Got problem deploying the uaa-guard-proxy app. The buildpack for this app was not detected correctly. So the app cannot be started.
$ cat /tmp/cf-uaa-guard-service-proxy-manifest.yml
---
applications:
- name: uaa-guard-proxy
command: proxy
path: proxy
memory: 128M
env:
GUARD_COOKIE_SECRET: very-secret
GUARD_DEFAULT_CALLBACK_URL: http://uaa-guard-proxy.local.pcfdev.io/auth/cloudfoundry/callback
GUARD_LOGIN_URL: https://uaa1.local.pcfdev.io
GUARD_CLIENT_KEY: oauth_showcase_authorization_code
GUARD_CLIENT_SECRET: secret
#GOPACKAGENAME: github.com/cloudfoundry/go-buildpack
$ cf push uaa-guard-proxy -p /tmp/cf-uaa-guard-service-git/cf-uaa-guard-service -f /tmp/cf-uaa-guard-service-proxy-manifest.yml
Pushing from manifest to org pcfdev-org / space pcfdev-space as admin...
Using manifest file /tmp/cf-uaa-guard-service-proxy-manifest.yml
Getting app info...
Creating app with these attributes...
+ name: uaa-guard-proxy
path: /tmp/cf-uaa-guard-service-git/cf-uaa-guard-service
+ command: proxy
+ memory: 128M
env:
+ GUARD_CLIENT_KEY
+ GUARD_CLIENT_SECRET
+ GUARD_COOKIE_SECRET
+ GUARD_DEFAULT_CALLBACK_URL
+ GUARD_LOGIN_URL
routes:
+ uaa-guard-proxy.local.pcfdev.io
Creating app uaa-guard-proxy...
Mapping routes...
Comparing local files to remote cache...
Packaging files to upload...
Uploading files...
9.31 KiB / 9.31 KiB [==============================================================================================================] 100.00% 1s
Waiting for API to complete processing files...
Staging app and tracing logs...
Downloading go_buildpack_new...
Downloading java_buildpack...
Downloading ruby_buildpack...
Downloading dotnet-core_buildpack...
Downloading nodejs_buildpack...
Downloaded go_buildpack_new
Downloading go_buildpack...
Downloaded java_buildpack
Downloading python_buildpack...
Downloaded ruby_buildpack
Downloading php_buildpack...
Downloaded dotnet-core_buildpack
Downloading staticfile_buildpack...
Downloaded staticfile_buildpack
Downloading binary_buildpack...
Downloaded php_buildpack
Downloaded binary_buildpack
Downloaded nodejs_buildpack
Downloaded python_buildpack
Downloaded go_buildpack
Creating container
Successfully created container
Downloading app package...
Downloaded app package (9.3K)
Staging...
None of the buildpacks detected a compatible application
Exit status 222
Staging failed: Exited with status 222
Destroying container
Successfully destroyed container
Error staging application: An app was not successfully detected by any available buildpack
TIP: Use 'cf buildpacks' to see a list of supported buildpacks.
FAILED
Comments
Can you check the directory you are pushing from? The sample manifest references the app directory `proxy` and therefore you need to be in the root of the guard proxy:
cf-uaa-guard-service-master -> if using the zip
cf-uaa-guard-service -> if you cloned the repo
I think you need to specify which buildpack you are using in the manifest file. Also, can you check the log files by using
cf logs APP_NAME --recent
to get more information?