Add dockerfile

Dockerfile

@@ -0,0 +1,21 @@
+FROM golang:1.21-alpine AS builder
+
+WORKDIR /app
+
+COPY go.mod main.go ./
+
+RUN go mod tidy && \
+    go mod download && \
+    CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o server .
+
+FROM scratch
+
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+
+COPY --from=builder /app/server /server
+
+USER 65534:65534
+
+EXPOSE 4050
+
+ENTRYPOINT ["/server"]