Merge pull request #32 from moul/dependabot/docker/alpine-3.13.5

chore(deps): bump alpine from 3.13.4 to 3.13.5

Dockerfile

@@ -9,7 +9,7 @@ COPY            . ./
 RUN             make install
 
 # minimalist runtime
-FROM            alpine:3.13.4
+FROM            alpine:3.13.5
 COPY            --from=builder /go/bin/dl /bin/
 ENTRYPOINT      ["/bin/dl"]
 CMD             []