multi-stage build

order-service/Dockerfile

@@ -1,15 +1,29 @@
-FROM golang:1.22.2
+# First stage: Build the Go binary
+FROM golang:1.22.2-alpine AS builder
 
 WORKDIR /app
 
+# Copy go.mod and go.sum to cache dependencies
 COPY go.mod ./
 COPY go.sum ./
 RUN go mod download
 
+# Copy the rest of the application files
 COPY . .
 
-RUN go build -o main .
+# Build the Go app as a statically linked binary
+RUN CGO_ENABLED=0 GOOS=linux go build -o main .
 
+# Second stage: Minimal runtime image
+FROM alpine:latest
+
+WORKDIR /root/
+
+# Copy the Go binary from the builder stage
+COPY --from=builder /app/main .
+
+# Expose port 8083
 EXPOSE 8083
 
-CMD ["./main"] 
+# Run the Go binary
+CMD ["./main"]