add nc to dockerfile

Author: pcmehrdad

Dockerfile

@@ -17,11 +17,16 @@ RUN go mod download
 # Build the application
 RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o proxy-server .
 
+# Intermediate stage to include nc
+FROM alpine:latest AS nc-builder
+RUN apk add --no-cache netcat-openbsd
+
 # Final stage
 FROM scratch
 WORKDIR /app
 COPY --from=builder /build/proxy-server .
 COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+COPY --from=nc-builder /bin/nc /bin/nc
 
 EXPOSE 1080
 CMD ["./proxy-server"]