Merge branch 'add-dnscontrol-image' into 'master'

feat: add dnscontrol image

See merge request !6

dnscontrol/Dockerfile

+FROM stackexchange/dnscontrol:latest
+
+LABEL \
+        org.opencontainers.image.title="dnscontrol" \
+        org.opencontainers.image.url="https://code.fbi.h-da.de/hdacloud/images" \
+        org.opencontainers.image.source="https://code.fbi.h-da.de/hdacloud/images"
+
+RUN apk add \
+        py3-pip \
+        openssh-client
+
+RUN pip install \
+        python-gitlab \
+        ansible
+
+WORKDIR /dns
+
+ENTRYPOINT [""]
+

tools/kaniko-build

@@ -23,4 +23,6 @@ EOF
 exec /kaniko/executor \
 	--context "$context" \
 	--dockerfile "$dockerfile" \
-	--destination "$destination"
+	--destination "$destination" \
+  --cleanup \
+  --force