Merge pull request #14 from moul/renovate/docker-all

chore(deps): update alpine docker tag to v3.13

Author: moul

Dockerfile

@@ -14,7 +14,7 @@ COPY            . ./
 RUN             make install
 
 # minimalist runtime
-FROM            alpine:3.12
+FROM            alpine:3.13
 LABEL           org.label-schema.build-date=$BUILD_DATE \
                 org.label-schema.name="guilhunize" \
                 org.label-schema.description="" \