Bump Bazel version -> 4.1.0 and Protobuf version -> 3.17.3

WORKSPACE

@@ -22,10 +22,10 @@ http_archive(
 
 http_archive(
     name = "com_google_protobuf",
-    sha256 = "efaf69303e01caccc2447064fc1832dfd23c0c130df0dc5fc98a13185bb7d1a7",
+    sha256 = "77ad26d3f65222fd96ccc18b055632b0bfedf295cb748b712a98ba1ac0b704b2",
-    strip_prefix = "protobuf-678da4f76eb9168c9965afc2149944a66cd48546",
+    strip_prefix = "protobuf-3.17.3",
     urls = [
-        "https://github.com/google/protobuf/archive/678da4f76eb9168c9965afc2149944a66cd48546.tar.gz",
+        "https://github.com/protocolbuffers/protobuf/releases/download/v3.17.3/protobuf-all-3.17.3.tar.gz",
     ],
 )
 

net/grpc/gateway/docker/common/Dockerfile

@@ -14,13 +14,15 @@
 
 FROM node:12-stretch
 
+ARG PROTOBUF_VERSION=3.17.3
+
 RUN apt-get -qq update && apt-get -qq install -y \
   unzip
 
 WORKDIR /tmp
 
-RUN curl -sSL https://github.com/protocolbuffers/protobuf/releases/download/v3.15.6/\
+RUN curl -sSL https://github.com/protocolbuffers/protobuf/releases/download/v$PROTOBUF_VERSION/\
-protoc-3.15.6-linux-x86_64.zip -o protoc.zip && \
+protoc-$PROTOBUF_VERSION-linux-x86_64.zip -o protoc.zip && \
   unzip -qq protoc.zip && \
   cp ./bin/protoc /usr/local/bin/protoc
 

net/grpc/gateway/docker/prereqs/Dockerfile

@@ -16,7 +16,7 @@ FROM grpcweb/common
 
 ARG MAKEFLAGS=-j8
 ARG BUILDIFIER_VERSION=1.0.0
-ARG BAZEL_VERSION=3.7.0
+ARG BAZEL_VERSION=4.1.0
 
 RUN echo "\nloglevel=error\n" >> $HOME/.npmrc