public String getGrpcEndpoint() {
        return "http://" + getHost() + ":" + getMappedPort(8081);
    }
Testcontainers implementation for OpenFGA.
<p>
Supported image: {@code openfga/openfga}
<p>
Exposed ports:
<ul>
    <li>Playground: 3000</li>
    <li>HTTP: 8080</li>
    <li>gRPC: 8081</li>
</ul>
modules/openfga/src/main/java/org/testcontainers/openfga/OpenFGAContainer.java