refactor dockerfile (#6402)

Signed-off-by: Junya Okabe <junya.okabe.ig@gmail.com>

Author: Okabe-Junya

tool/codegen/Dockerfile

@@ -1,62 +1,60 @@
-# Builder image to build go program.
-FROM golang:1.25.2 AS builder
+# Builder stage
+FROM golang:1.25.5-bookworm AS builder
 
 COPY protoc-gen-auth /protoc-gen-auth
 RUN cd /protoc-gen-auth \
   && go build -o /usr/local/bin/protoc-gen-auth . \
   && chmod +x /usr/local/bin/protoc-gen-auth
 
-# Codegen image which is actually being used.
-FROM golang:1.25.2
-
-# This is version of protobuf installed in the image.
-# See https://pkgs.alpinelinux.org/packages?name=protobuf&branch=v3.16
-# NOTE: Start from protobuf v3.20.1, the protoc-gen-js is not included in protobuf package.
-ENV PROTOC_GEN_JS_VER=3.21.2
 ENV PROTOC_GEN_GO_VER=1.27.1
-ENV PROTOC_GEN_GRPC_WEB_VER=1.3.1
 ENV PROTOC_GEN_GO_GRPC_VER=1.2.0
 ENV PROTOC_GEN_VALIDATE_VER=0.6.6
 ENV GOMOCK_VER=0.6.0
 
-# dependecies and protoc
-RUN apt update && apt install -y protobuf-compiler
-
-# protoc-gen-go
 RUN go install google.golang.org/protobuf/cmd/protoc-gen-go@v${PROTOC_GEN_GO_VER}
-
-# protoc-gen-go-grpc
 RUN go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@v${PROTOC_GEN_GO_GRPC_VER}
+RUN go install github.com/envoyproxy/protoc-gen-validate@v${PROTOC_GEN_VALIDATE_VER}
+RUN go install go.uber.org/mock/mockgen@v${GOMOCK_VER}
+
+RUN wget -q https://github.com/envoyproxy/protoc-gen-validate/archive/refs/tags/v${PROTOC_GEN_VALIDATE_VER}.tar.gz -O protoc-gen-validate.tar.gz \
+  && mkdir -p /proto-validate \
+  && tar xzf protoc-gen-validate.tar.gz -C /proto-validate --strip-components=1 \
+  && rm protoc-gen-validate.tar.gz
+
+# Runtime stage
+FROM debian:bookworm-slim
+
+ENV PROTOC_GEN_JS_VER=3.21.2
+ENV PROTOC_GEN_GRPC_WEB_VER=1.3.1
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    protobuf-compiler \
+    wget \
+    ca-certificates \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY --from=builder /go/bin/protoc-gen-go /usr/local/bin/
+COPY --from=builder /go/bin/protoc-gen-go-grpc /usr/local/bin/
+COPY --from=builder /go/bin/protoc-gen-validate /usr/local/bin/
+COPY --from=builder /go/bin/mockgen /usr/local/bin/
+COPY --from=builder /usr/local/bin/protoc-gen-auth /usr/local/bin/
+COPY --from=builder /proto-validate /go/src/github.com/envoyproxy/protoc-gen-validate
 
-# protoc-gen-grpc-web
-RUN wget https://github.com/grpc/grpc-web/releases/download/${PROTOC_GEN_GRPC_WEB_VER}/protoc-gen-grpc-web-${PROTOC_GEN_GRPC_WEB_VER}-linux-x86_64 \
+RUN wget -q https://github.com/grpc/grpc-web/releases/download/${PROTOC_GEN_GRPC_WEB_VER}/protoc-gen-grpc-web-${PROTOC_GEN_GRPC_WEB_VER}-linux-x86_64 \
   && mv protoc-gen-grpc-web-${PROTOC_GEN_GRPC_WEB_VER}-linux-x86_64 /usr/local/bin/protoc-gen-grpc-web \
   && chmod +x /usr/local/bin/protoc-gen-grpc-web
 
-# protoc-gen-validate
-RUN go install github.com/envoyproxy/protoc-gen-validate@v${PROTOC_GEN_VALIDATE_VER} \
-  && wget -q https://github.com/envoyproxy/protoc-gen-validate/archive/refs/tags/v${PROTOC_GEN_VALIDATE_VER}.tar.gz -O protoc-gen-validate.tar.gz \
-  && mkdir -p /go/src/github.com/envoyproxy \
-  && tar xvfz protoc-gen-validate.tar.gz -C /go/src/github.com/envoyproxy \
-  && rm protoc-gen-validate.tar.gz \
-  && mv /go/src/github.com/envoyproxy/protoc-gen-validate-${PROTOC_GEN_VALIDATE_VER} /go/src/github.com/envoyproxy/protoc-gen-validate
-
-# protoc-gen-js
-# This is a workaround to use it  https://github.com/protocolbuffers/protobuf-javascript/issues/127#issuecomment-1361047597
+# See: https://github.com/protocolbuffers/protobuf-javascript/issues/127#issuecomment-1361047597
 RUN for target in x86_64 aarch_64; do \
   mkdir /protoc-gen-js-${target} && cd /protoc-gen-js-${target} \
-  && wget https://github.com/protocolbuffers/protobuf-javascript/releases/download/v${PROTOC_GEN_JS_VER}/protobuf-javascript-${PROTOC_GEN_JS_VER}-linux-${target}.tar.gz \
-  && tar xvfz protobuf-javascript-${PROTOC_GEN_JS_VER}-linux-${target}.tar.gz \
+  && wget -q https://github.com/protocolbuffers/protobuf-javascript/releases/download/v${PROTOC_GEN_JS_VER}/protobuf-javascript-${PROTOC_GEN_JS_VER}-linux-${target}.tar.gz \
+  && tar xzf protobuf-javascript-${PROTOC_GEN_JS_VER}-linux-${target}.tar.gz \
   && chmod +x bin/protoc-gen-js \
-  && rm -rf protobuf-javascript-${PROTOC_GEN_JS_VER}-linux-${target}.tar.gz; \
+  && rm -f protobuf-javascript-${PROTOC_GEN_JS_VER}-linux-${target}.tar.gz; \
   done && \
   mv /protoc-gen-js-aarch_64/ /protoc-gen-js-aarch64/
 
-# protoc-gen-auth
-COPY --from=builder /usr/local/bin/protoc-gen-auth /usr/local/bin/
-
-# gomock
-RUN go install go.uber.org/mock/mockgen@v${GOMOCK_VER}
+RUN apt-get purge -y wget ca-certificates && apt-get autoremove -y && rm -rf /var/lib/apt/lists/*
 
 VOLUME /repo
 WORKDIR /repo