fix(Dockerfile): update dockerfile

Author: lc

2

@@ -1,5 +1,5 @@
-# Build image: golang:1.14-alpine3.13
-FROM golang:1.17-alpine3.15 as build
+# Build image: golang:1.21.0-alpine3.17
+FROM golang:1.21.0-alpine3.17 as build
 
 WORKDIR /app
 
@@ -8,8 +8,8 @@ RUN go mod download && go build -o ./build/gau ./cmd/gau
 
 ENTRYPOINT ["/app/gau/build/gau"]
 
-# Release image: alpine:3.14.1
-FROM alpine:3.14.1
+# Release image: alpine:3.17
+FROM alpine:3.17
 
 RUN apk -U upgrade --no-cache
 COPY --from=build /app/build/gau /usr/local/bin/gau