Backend Dockerfile init

webpage/backend/Dockerfile

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+# Docker image definition
+
+FROM golang:1.22-bookworm as go-build
+
+WORKDIR /go/src/app
+
+COPY ./*go .
+
+RUN go mod init bbb && \
+  go mod tidy && \
+  CGO_ENABLED=0 GOOS=linux GOARCH=${TARGETARCH} go build -o /bbb .
+
+# final image
+FROM gcr.io/distroless/static-debian12:nonroot
+
+USER nonroot:nonroot
+
+WORKDIR /app
+
+COPY --chown=nonroot:nonroot --from=go-build /bbb /app/
+
+ENTRYPOINT ["./bbb"]