prep for nonempty pp

Dockerfile

@@ -12,11 +12,13 @@ RUN apk update && \
     sed -i -e 's/inet_interfaces = localhost/inet_interfaces = all/g' /etc/postfix/main.cf
 
 # Gpg for pass/pmb
+ARG GPG_PP=""
+RUN echo "@@@@@@@@@@@@@@@@@@@@   Passphrase:"${GPG_PP}
 RUN mkdir /root/.gnupg
 #RUN echo "default-cache-ttl 34560000" >> /root/.gnupg/gpg-agent.conf
 #RUN echo "max-cache-ttl 34560000" >> /root/.gnupg/gpg-agent.conf
 RUN gpg-agent --daemon --batch --disable-scdaemon
-RUN gpg --quick-gen-key --batch --passphrase '' pmbkey
+RUN gpg --quick-gen-key --batch --passphrase "${GPG_PP}" pmbkey
 RUN pass init pmbkey
 
 COPY dotmsmtprc /root/.msmtprc