Update Dockerfile

Dockerfile

@@ -1,6 +1,7 @@
 # build
-FROM chimeralinux/chimera:latest AS build
+FROM kgrv/golang AS build
 
+USER root
 RUN apk update && apk add --no-cache go
 COPY go.mod /workspace/
 COPY main.go /workspace/
@@ -11,9 +12,7 @@ RUN CGO_ENABLED=0 go build -ldflags="-s -w" -o blitzwing .
 
 # runtime
 
-FROM kgrv/mini:malloc AS runtime
+FROM scratch AS runtime
 COPY --from=build /workspace/blitzwing /blitzwing
-WORKDIR /
-USER mini
 CMD ["./blitzwing"]
 EXPOSE 3333