docker: update Alpine tools to fix apk-tools vulnerability (try #2)

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## 3.4.4
+
+OTHER:
+
+- re-release 3.4.3 to rebuild Docker image with security vulnerabilities fixes
+
 ## 3.4.3 (August 20th, 2021)
 
 OTHER:

docker/Dockerfile

@@ -5,6 +5,7 @@ EXPOSE 5353 8080
 ARG DYNDNSD_VERSION
 
 RUN apk --no-cache add openssl ca-certificates && \
+    apk upgrade apk-tools && \
     apk --no-cache add ruby ruby-etc ruby-io-console ruby-json ruby-webrick && \
     apk --no-cache add --virtual .build-deps linux-headers ruby-dev build-base tzdata && \
     gem install --no-document dyndnsd -v ${DYNDNSD_VERSION} && \