Initial commit 4.

backend/Dockerfile

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+FROM golang:1.23-alpine AS builder
+
+WORKDIR /app
+
+# Copy go.mod and go.sum files
+COPY go.mod go.sum ./
+
+# Download dependencies
+RUN go mod download
+
+# Copy the source code
+COPY . .
+
+# Build the application
+RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o server main.go
+
+# Use a small alpine image for the final stage
+FROM alpine:latest
+
+RUN apk --no-cache add ca-certificates
+
+WORKDIR /app
+
+# Copy the binary from the builder stage
+COPY --from=builder /app/server .
+
+# Expose the application port
+EXPOSE 8080
+
+# Set environment variables
+ENV PORT=8080
+ENV GIN_MODE=release
+
+# Run the application
+CMD ["./server"]