Update arm64 build of gateway

- adds version folder - tested on Rock64

Signed-off-by: Alex Ellis (VMware) <alexellis2@gmail.com>

gateway/Dockerfile.arm64

@@ -13,6 +13,7 @@ COPY tests          tests
 COPY types          types
 COPY queue          queue
 COPY plugin         plugin
+COPY version        version
 COPY scaling        scaling
 COPY server.go      .