Fix hadolint

Dockerfile

+# hadolint ignore=DL3007
 FROM lscr.io/linuxserver/nginx:latest
 
 # set version label
 ENV VERSION=master
 ENV TT_RSS_VERSION=master
-LABEL build_version="Linuxserver.io version:- ${VERSION} Build-date:- $(date '+%Y/%m/%d %H:%M:%S')"
-LABEL maintainer="sparklyballs"
 
+# hadolint ignore=DL3018
 RUN \
  echo "**** install packages ****" && \
  apk add --no-cache --upgrade \