[hw-1] implement cart service

cart/Dockerfile

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+FROM golang:1.23.1-alpine as builder
+
+WORKDIR /build
+
+COPY go.mod go.mod
+COPY go.sum go.sum
+
+RUN go mod download
+
+COPY . .
+
+RUN CGO_ENABLED=0 GOOS=linux go build -o /server ./cmd/server/main.go
+
+FROM scratch
+COPY --from=builder server /bin/server
+COPY configs/values_local.yaml /bin/config/values_local.yaml
+
+ENV CONFIG_FILE=/bin/config/values_local.yaml
+
+ENTRYPOINT ["/bin/server"]