added Dockerfile

Makefile

@@ -76,3 +76,12 @@ cover-html: ## Run tests with coverage and open the HTML report
 	go test -coverprofile=/tmp/go-sim-lb.cover.tmp ./...
 	go tool cover -html=/tmp/go-sim-lb.cover.tmp
 	unlink /tmp/go-sim-lb.cover.tmp
+
+.PHONY: docker-images
+docker-images: ## Build the Docker images
+	DOCKER_BUILDKIT=1 docker build \
+		--platform linux/amd64 \
+		--build-arg VERSION=${VERSION} \
+		--file proxy-server.dockerfile \
+		--tag cvm-proxy-server \
+	.

proxy-server.dockerfile

@@ -0,0 +1,23 @@
+# syntax=docker/dockerfile:1
+FROM golang:1.23 AS builder
+ARG VERSION
+WORKDIR /build
+ADD go.mod /build/
+RUN --mount=type=cache,target=/root/.cache/go-build CGO_ENABLED=0 GOOS=linux \
+       go mod download
+ADD . /build/
+RUN --mount=type=cache,target=/root/.cache/go-build CGO_ENABLED=0 GOOS=linux \
+    go build \
+        -trimpath \
+        -ldflags "-s -X main.version=${VERSION}" \
+        -v \
+        -o proxy-server \
+    cmd/proxy-server/main.go
+
+FROM alpine:latest
+WORKDIR /app
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+COPY --from=builder /build/proxy-server /app/proxy-server
+ENV LISTEN_ADDR=":8080"
+EXPOSE 8080
+CMD ["/app/proxy-server"]