Merge pull request #1058 from antontroshin/fix-go-tutorial-docker-build

Fix distributed calculator tutorial Go docker build

tutorials/distributed-calculator/go/Dockerfile

@@ -1,11 +1,10 @@
 #first stage - builder
-FROM golang:1.15-buster as builder
+FROM golang:1.22-bookworm as builder
 WORKDIR /dir
-COPY app.go .
-RUN go get -d -v
+COPY app.go go.mod go.sum ./
 RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o app .
 #second stage
-FROM debian:buster-slim
+FROM debian:bookworm-slim
 WORKDIR /root/
 COPY --from=builder /dir/app .
 CMD ["./app"]