Lets upgrde apk-tools to the latest version to mitigate a cve

Dockerfile

@@ -145,6 +145,7 @@ COPY --from=0 /usr/bin/envsubst /usr/local/bin/envsubst
 RUN \
 	addgroup -S nginx \
 	&& adduser -D -S -h /var/cache/nginx -s /sbin/nologin -G nginx nginx \
+	&& apk add --no-cache --upgrade apk-tools \
 	&& apk add --no-cache --virtual .nginx-rundeps tzdata $(cat /tmp/runDeps.txt) \
 	&& rm /tmp/runDeps.txt \
 	&& ln -s /usr/lib/nginx/modules /etc/nginx/modules \