The http.filesystem example hangs when returning some files

[drymus]

Steps to reproduce:

1. Change directly into the http.filesystem example directory
2. Change the line password: ${{env.KEYSTORE_PASSWORD}} in zilla.yaml to password: generated.
3. Download the attached jquery.slim.min.js.zip and unzip it into the www directory
4. Run zilla using the following docker command:

   docker run \
   -p 8080:8080 \
   -p 9090:9090 \
   -v `pwd`/zilla.yaml:/etc/zilla/zilla.yaml \
   -v `pwd`/tls/localhost.p12:/etc/zilla/tls/localhost.p12 \
   -v `pwd`/www:/var/www ghcr.io/aklivity/zilla:0.9.57 \
   start -v

5. In another terminal window run curl http://localhost:8080/jquery.slim.min.js -v
6. Observe that the curl command doesn't return as expected jquery.slim.min.js.zip