add dockerfile

Dockerfile

@@ -0,0 +1,12 @@
+FROM golang:1.22-alpine AS builder
+WORKDIR /app
+COPY go.mod go.sum ./
+RUN go mod download
+COPY . .
+RUN CGO_ENABLED=0 go build -ldflags="-s -w" -o hauk .
+
+FROM alpine:3.19
+RUN apk add --no-cache ca-certificates
+COPY --from=builder /app/hauk /usr/local/bin/
+EXPOSE 8080
+CMD ["hauk"]