Also, just something to consider, if you are going to all the trouble to setup WireMock in this configuration, you should really take a look at WireMock Cloud -
https://www.wiremock.io/comparison
WireMock Cloud will remove some of the headaches of hosting and scaling your own WireMock instances as well as adding additional capabilities such as mock creation from openAPI spec, Chaos testing, contract testing, import data from CSV files and the newer stateful mock functionality. gRPC mocking will also be added to that list very soon