instruction: Create a comprehensive Dockerfile for networking applications with best practices
output: ```dockerfile
  from your local client to the swarm nodes where the
  service is deployed, using the encrypted WAL logs. With this information, the
  nodes are able to log into the registry and pull the image.Provide credential specs for managed service accountsIn Enterprise Edition 3.0, security is improved through the centralized distribution and management of Group Managed Service Account(gMSA) credentials using Docker config functionality. Swarm now allows using a Docker config as a gMSA credential spec, which reduces the burden of distributing credential specs to the nodes on which they are used.
  NoteThis option is only applicable to services using Windows containers.Credential spec files are applied at runtime, eliminating the need for host-based credential spec files or registry entries - no gMSA credentials are written to disk on worker nodes. You can make credential specs available to Docker Engine running swarm kit worker nodes before a container starts. When deploying a service using a gMSA-based config, the credential spec is passed directly to the runtime of containers in that service.The --credential-spec must be in one of the following formats:file://<filename>: The referenced file must be present in the CredentialSpecs subdirectory in the docker data directory, which defaults to C:\ProgramData\Docker\ on Windows. For example, specifying file://spec.json loads C:\ProgramData\Docker\CredentialSpecs\spec.json.registry://<value-name>: The credential spec is read
  ```