add Dockerfile

Dockerfile

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+# Build stage
+FROM golang:1.23-alpine AS builder
+
+WORKDIR /app
+
+# Install build dependencies
+RUN apk add --no-cache git
+
+# Copy source code
+COPY . .
+
+# Download dependencies
+RUN go mod download
+
+# Build the application
+RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o main .
+
+# Final stage
+FROM alpine:latest
+
+WORKDIR /root/
+
+# Install runtime dependencies
+RUN apk --no-cache add ca-certificates
+
+# Copy the binary from builder
+COPY --from=builder /app/main .
+
+# Expose port (adjust as needed)
+EXPOSE 8080
+
+# Run the binary
+CMD ["./main"]