Updating to match upstream

Author: lukekraus45

src/productcatalogservice/Dockerfile

@@ -1,17 +1,27 @@
+# Copyright The OpenTelemetry Authors
+# SPDX-License-Identifier: Apache-2.0
+
 FROM registry.ddbuild.io/images/mirror/golang:1.22-alpine AS builder
 
 WORKDIR /usr/src/app/
 
-RUN apk add build-base protobuf-dev protoc
-
 RUN apk update \
     && apk add --no-cache make protobuf-dev
 
-COPY ./src/productcatalogservice/ ./
-RUN go generate
-RUN go build -o /go/bin/productcatalogservice/
+RUN --mount=type=cache,target=/go/pkg/mod/ \
+    --mount=type=bind,source=./src/productcatalogservice/go.sum,target=go.sum \
+    --mount=type=bind,source=./src/productcatalogservice/go.mod,target=go.mod \
+    --mount=type=bind,source=./src/productcatalogservice/tools.go,target=tools.go \
+    go mod download \
+    && go list -e -f '{{range .Imports}}{{.}} {{end}}' tools.go | CGO_ENABLED=0 xargs go install -mod=readonly
+
+RUN --mount=type=cache,target=/go/pkg/mod/ \
+    --mount=type=cache,target=/root/.cache/go-build \
+    --mount=type=bind,rw,source=./src/productcatalogservice,target=. \
+    --mount=type=bind,rw,source=./pb,target=./pb \
+    protoc -I ./pb ./pb/demo.proto --go_out=./ --go-grpc_out=./ \
+    && go build -ldflags "-s -w" -o /go/bin/productcatalogservice/ ./
 
-# -----------------------------------------------------------------------------
 FROM registry.ddbuild.io/images/mirror/alpine:latest AS release
 
 WORKDIR /usr/src/app/