Add upload token config validation

examples/http-upload-local.yml

@@ -9,11 +9,15 @@ server:
     queue_size: 16
     max_concurrency: 1
     retention: 24h
+upload_tokens:
+  - id: example-uploader
+    token_env: DISTRIBUTOR_EXAMPLE_UPLOAD_TOKEN
+    allow_pipelines:
+      - example-http-upload
 pipelines:
   - id: example-http-upload
     source:
       backend: http_upload
-      token_env: DISTRIBUTOR_EXAMPLE_UPLOAD_TOKEN
     destinations:
       - id: local-archive
         backend: local
@@ -21,4 +25,3 @@ pipelines:
         publish:
           source: true
           html: false
-