Optimized RUN and added tzdata package to configure timezione with TZ…

… environment

Dockerfile

@@ -18,20 +18,14 @@ LABEL org.opencontainers.image.authors=$AUTHORS \
       org.opencontainers.image.revision=$VCS_REF \
       org.opencontainers.image.description="Docker Image di Satosa-Saml2Spid."
 
-RUN apk update
-RUN apk add --update --no-cache tzdata
-RUN cp /usr/share/zoneinfo/Europe/Rome /etc/localtime
-RUN echo "Europe/Rome" > /etc/timezone
-RUN apk del tzdata
-
-# fix: no /etc/mime.types file found.
-RUN apk add mailcap
 
 COPY requirements.txt /
 
 ENV BASEDIR="/satosa_proxy"
 
-RUN apk add --update xmlsec libffi-dev openssl-dev python3 py3-pip python3-dev procps git openssl build-base gcc wget bash jq yq-go pcre-dev
+# "tzdata"  package is required to set timezone with TZ environment
+# "mailcap" package is required to add mimetype support
+RUN apk add --update --no-cache tzdata mailcap xmlsec libffi-dev openssl-dev python3 py3-pip python3-dev procps git openssl build-base gcc wget bash jq yq-go pcre-dev
 
 RUN python3 -m venv .venv && . .venv/bin/activate && pip3 install --upgrade pip setuptools \ 
       && pip3 install -r requirements.txt --ignore-installed --root-user-action=ignore && mkdir $BASEDIR