add slim

Author: euanh

.github/workflows/pull_request.yml

@@ -27,9 +27,9 @@ jobs:
               run: |
                   curl -v localhost:5000/v2/
 
-            - name: Push somethingtry
+            - name: Push something
               run: |
-                  swift run containertool --repository localhost:5000/vapor Package.swift
+                  swift run containertool --repository localhost:5000/vapor Package.swift --from swift:slim
 
             - name: Run the example
               run: |