Update Dockerfile

Author: mchmarny

Dockerfile

@@ -1,9 +1,9 @@
 FROM golang:buster AS build-env
 WORKDIR /src/
 COPY . /src/
-ARG VERSION v0.2.14-dirty
-ARG COMMIT c3536e5
-ARG DATE 2023-03-09T18:52:01Z
+ARG VERSION
+ARG COMMIT
+ARG DATE
 ENV VERSION ${VERSION}
 ENV COMMIT ${COMMIT}
 ENV DATE ${DATE}
@@ -14,9 +14,9 @@ RUN CGO_ENABLED=0 go build -trimpath -ldflags="\
 	-extldflags '-static'" \
     -a -mod vendor -o vulctl cmd/vulctl/main.go
 
-# chainguard's static seems to bring list of vulnerabilities
+# chainguard's static seems to provide best balance of size and vulnerabilities
 # gogole/distroless: 13.3 MB, 18 vulnerabilities (all low)
-# chainguard/static: 4.7 MB, 0 vulnerabilities
+# chainguard/static:  4.7 MB, 0 vulnerabilities
 FROM cgr.dev/chainguard/static:latest
 COPY --from=build-env /src/vulctl /
 ENTRYPOINT ["/vulctl"]