[SSL] create individual domain certificates, add SNI configs for Postfix/Dovecot/Nginx

data/Dockerfiles/acme/Dockerfile

@@ -18,6 +18,11 @@ RUN apk upgrade --no-cache \
   && python3 -m pip install acme-tiny
 
 COPY acme.sh /srv/acme.sh
+COPY functions.sh /srv/functions.sh
+COPY obtain-certificate.sh /srv/obtain-certificate.sh
+COPY reload-configurations.sh /srv/reload-configurations.sh
 COPY expand6.sh /srv/expand6.sh
 
+RUN chmod +x /srv/*.sh
+
 CMD ["/sbin/tini", "-g", "--", "/srv/acme.sh"]