### Is there an existing issue for this?

- [X] I have searched the existing issues

### Feature description

The use case I have in mind is to run Node 16.x Lambdas - the default container registry is `lambci/lambda` which is effectively abandoned. [Not even Node 14.x has been published](https://github.com/lambci/docker-lambda/pull/330). However, switching the registry over to [`amazon/aws-lambda-nodejs`](https://hub.docker.com/r/amazon/aws-lambda-nodejs) still fails to pull the container, since localstack is looking for the tag `nodejs16.x`. I'd like to be able to specify that if the runtime is `nodejs16.x` it just looks for tag `16`.

### 🧑‍💻 Implementation

_No response_

### Anything else?

_No response_
"""
        Return the Java classpath, using the parent folder of the
        given archive as the base folder.
        The result contains any *.jar files in the base folder, as
        well as any JAR files in the "lib/*" subfolder living
        alongside the supplied java archive (.jar or .zip).
        :param archive: an absolute path to a .jar or .zip Java archive
        :return: the Java classpath, relative to the base dir of "archive"
        """
        entries = ["."]
        base_dir = os.path.dirname(archive)
        for pattern in ["%s/*.jar", "%s/lib/*.jar", "%s/java/lib/*.jar", "%s/*.zip"]:
            for entry in glob.glob(pattern % base_dir):
                if os.path.realpath(archive) != os.path.realpath(entry):
                    entries.append(os.path.relpath(entry, base_dir))
        
        
        entries.append(os.path.relpath(archive, base_dir))
        entries.append("*.jar")
        entries.append("java/lib/*.jar")
        result = ":".join(entries)
        return result
    @staticmethod
    def mountable_tmp_file():