Bump alpine from 3.13.1 to 3.13.2 (#23)

Bumps alpine from 3.13.1 to 3.13.2.

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Diff for: Dockerfile

@@ -7,7 +7,7 @@ WORKDIR /github.com/solarwinds/rkubelog
 ADD . .
 RUN CGO_ENABLED=0 go build -mod vendor -ldflags='-w -s -extldflags "-static"' -a -o /rkubelog .
 
-FROM alpine:3.13.1
+FROM alpine:3.13.2
 COPY --from=main /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
 COPY --from=main /etc/ssl/certs/papertrail-bundle.pem /etc/ssl/certs/
 COPY --from=main /rkubelog /app/rkubelog