refactor Dockerfile for multi-stage build; update compose.yaml for production settings and network configuration

Author: davidyannick86

Dockerfile

@@ -1,6 +1,13 @@
-FROM golang:1.23.4-alpine3.21
-RUN mkdir /app
-ADD . /app
+# Build stage
+FROM golang:1.23.4-alpine3.21 AS builder
 WORKDIR /app
+COPY . .
+RUN go mod download
 RUN go build -o main .
-CMD ["/app/main"]
+
+# Production stage
+FROM alpine:latest AS production
+WORKDIR /app
+COPY --from=builder /app/main .
+EXPOSE 8080
+CMD ["./main"]

compose.yaml

@@ -1,5 +1,17 @@
 services:
-  app:
-    image: go-crud-api
+  api:
+    image: go-crud-api:latest
+    build:
+      context: .
+      dockerfile: Dockerfile
+      target: production
     ports:
       - "8000:8000"
+    environment:
+      - GO_ENV=production
+    networks:
+      - go-network
+
+networks:
+  go-network:
+    driver: bridge