gha: test: foreground: no need for portfwds or bind mounts for first-contact test

Author: rpardini

.github/workflows/test.yaml

@@ -45,9 +45,7 @@ jobs:
       - name: Start foreground instance for first-contact sanity checking
         run: |
           timeout --signal=9 --verbose 10 docker run --name docker_registry_proxy_fg \
-            -p 0.0.0.0:3128:3128 -e ENABLE_MANIFEST_CACHE=false \
-            -v $(pwd)/docker_mirror_cache:/docker_mirror_cache \
-            -v $(pwd)/docker_mirror_certs:/ca \
+            -e ENABLE_MANIFEST_CACHE=false \
             sanity-check/docker-registry-proxy:latest || true
           sleep 3
           docker stop docker_registry_proxy_fg || true