Fix ts-client build error with latest Typescript types. (#1491)

Author: sampajano

net/grpc/gateway/docker/ts_client/Dockerfile

@@ -14,6 +14,11 @@
 
 FROM grpcweb/prereqs
 
+WORKDIR /github/grpc-web
+
+# Bring in current workspace
+COPY ./net/grpc/gateway/examples/echo ./net/grpc/gateway/examples/echo
+
 WORKDIR /github/grpc-web/net/grpc/gateway/examples/echo
 
 RUN protoc -I=. echo.proto \

net/grpc/gateway/examples/echo/ts-example/package.json

@@ -2,7 +2,7 @@
   "devDependencies": {
     "@types/google-protobuf": "~3.15.12",
     "@types/jquery": "~3.3.6",
-    "@types/node": "~10.17.0",
+    "@types/node": "latest",
     "google-protobuf": "~3.21.4",
     "grpc-web": "~1.5.0",
     "jquery": "~3.5.1",