Maybe this will help you get started.
podman pod create --name dms --hostname dms --publish 8080:8080,8443:8443 podman create -d --pod dms --name postgres -v $HOME/volumes/db-volume-data:/var/lib/postgresql/data:Z -v $HOME/volumes/db-volume-logs:/var/log/postgresql:Z -e POSTGRES_PASSWORD=pass1234 -e POSTGRES_USER=alfresco -e POSTGRES_DB=alfresco docker.io/library/postgres:11.7 postgres -c max_connections=300 -c logging_collector=true -c log_directory=/var/log/postgresql podman create -d --pod dms --name activemq -v $HOME/volumes/activemq-volume-data:/opt/activemq/data:Z docker.io/alfresco/alfresco-activemq:5.15.8 podman create -d --pod dms --name transform-core-aio docker.io/alfresco/alfresco-transform-core-aio:2.3.6 podman create -d --pod dms --name solr6 -v $HOME/volumes/solr-volume-data:/opt/alfresco-search-services/data:Z -v $HOME/volumes/solr-volume-logs:/opt/alfresco-search-services/logs:Z -v $HOME/volumes/solr-shared.properties:/opt/alfresco-search-services/solrhome/conf/shared.properties:Z,ro -v $HOME/volumes/solr-log4j.properties:/opt/alfresco-search-services/logs/log4j.properties:Z,ro -e SOLR_ALFRESCO_HOST=localhost -e SOLR_ALFRESCO_PORT=7080 -e SOLR_SOLR_HOST=localhost -e SOLR_SOLR_PORT=8983 -e SOLR_CREATE_ALFRESCO_DEFAULTS=alfresco,archive -e ALFRESCO_SECURE_COMMS=none docker.io/alfresco/alfresco-search-services:2.0.1 podman create -d --pod dms --name alfresco -v $HOME/volumes/alfresco-volume-data:/usr/local/tomcat/alf_data:Z -v $HOME/volumes/alfresco-volume-logs:/usr/local/tomcat/logs:Z -e JAVA_TOOL_OPTIONS=" -Dencryption.keystore.type=JCEKS -Dencryption.cipherAlgorithm=DESede/CBC/PKCS5Padding -Dencryption.keyAlgorithm=DESede -Dencryption.keystore.location=/usr/local/tomcat/shared/classes/alfresco/extension/keystore/keystore -Dmetadata-keystore.password=mp6yc0UD9e -Dmetadata-keystore.aliases=metadata -Dmetadata-keystore.metadata.password=oKIWzVdEdA -Dmetadata-keystore.metadata.algorithm=DESede" -e JAVA_OPTS=" -Ddb.driver=org.postgresql.Driver -Ddb.username=alfresco -Ddb.password=pass1234 -Ddb.url=jdbc:postgresql://localhost:5432/alfresco -Dsolr.host=localhost -Dsolr.port=8983 -Dsolr.secureComms=none -Dsolr.base.url=/solr -Dindex.subsystem.name=solr6 -Dshare.host=localhost -Dshare.port=8080 -Dalfresco.host=localhost -Dalfresco.port=7080 -Daos.baseUrlOverwrite=http://localhost:7080/alfresco/aos -Dmessaging.broker.url=\"failover:(nio://localhost:61616)?timeout=3000&jms.useCompression=true\" -Ddeployment.method=DEFAULT -DlocalTransform.core-aio.url=http://localhost:8090/ -Dalfresco-pdf-renderer.url=http://localhost:8090/ -Djodconverter.url=http://localhost:8090/ -Dimg.url=http://localhost:8090/ -Dtika.url=http://localhost:8090/ -Dtransform.misc.url=http://localhost:8090/ -Dcsrf.filter.enabled=false -Dgoogledocs.enabled=false -Dsample.site.disabled=true -XX:MinRAMPercentage=50 -XX:MaxRAMPercentage=80" docker.io/alfresco/alfresco-content-repository-community:6.2.2-RC1 podman create -d --pod dms --name share -v $HOME/volumes/share-volume-logs:/usr/local/tomcat/logs:Z -e REPO_HOST=localhost -e REPO_PORT=7080 -e JAVA_OPTS=" -XX:MinRAMPercentage=50 -XX:MaxRAMPercentage=80 -Dalfresco.host=localhost -Dalfresco.port=7080 -Dalfresco.context=alfresco -Dalfresco.protocol=http" docker.io/alfresco/alfresco-share:6.2.2
podman unshare
MOUNT_DIR=`podman mount alfresco`
TOMCAT_DIR=$MOUNT_DIR/usr/local/tomcat
cp ~/custom-model-context.xml $TOMCAT_DIR/shared/classes/alfresco/extension/
chown -R 33000 $TOMCAT_DIR
$MOUNT_DIR/usr/java/openjdk-11.0.7+10/bin/java -jar $TOMCAT_DIR/alfresco-mmt/alfresco-mmt*.jar uninstall org.alfresco.integrations.google.docs $TOMCAT_DIR/webapps/alfresco -nobackup -force
rm $TOMCAT_DIR/amps/alfresco-googledrive-repo-community-3.2.0.amp
cp $HOME/repo-amps/*.amp $TOMCAT_DIR/amps/
$MOUNT_DIR/usr/java/openjdk-11.0.7+10/bin/java -jar $TOMCAT_DIR/alfresco-mmt/alfresco-mmt*.jar install $TOMCAT_DIR/amps $TOMCAT_DIR/webapps/alfresco -directory -nobackup -force
sed -i "s/==/=/g" $TOMCAT_DIR/bin/catalina.sh
TOMCAT_SERVER_PORT=7005
TOMCAT_HTTP_PORT=7080
TOMCAT_SSL_PORT=7443
TOMCAT_AJP_PORT=7009
TOMCAT_JPDA_PORT=7000
sed -i "s/<Server\ port=\"8005\"\ shutdown=\"SHUTDOWN\">/<Server\ port=\"$TOMCAT_SERVER_PORT\"\ shutdown=\"SHUTDOWN\">/g" $TOMCAT_DIR/conf/server.xml
sed -i "s/port=\"8080\"\ protocol=\"HTTP\/1.1\"/port=\"$TOMCAT_HTTP_PORT\"\ protocol=\"HTTP\/1.1\"/g" $TOMCAT_DIR/conf/server.xml
sed -i "s/\ <Connector\ port=\"8443\"/\ <Connector port=\"$TOMCAT_SSL_PORT\"/g" $TOMCAT_DIR/conf/server.xml
sed -i "s/\ <Connector\ port=\"8009\"\ protocol=\"AJP\/1.3\"/\ <Connector\ port=\"$TOMCAT_AJP_PORT\"\ protocol=\"AJP\/1.3\"\ /g" $TOMCAT_DIR/conf/server.xml
sed -i "s/redirectPort=\"8443\"/redirectPort=\"$TOMCAT_SSL_PORT\"/g" $TOMCAT_DIR/conf/server.xml
podman umount alfresco
exit
I wanted to run under normal user, so created user dms. And did everything under that user. But you need cgroups v2 (try podman stats 
) and other stuff solved (moved from CentOS to Debian and everything worked).
I placed everything in one pod so had to renumber conflicting ports as all the containers share "localhost".
Repository not starting: Basically what I found out was that when you start repository image, it runs under userid (33000) that doesn't own tomcat directory so you have to fix this (chown -R 33000 $TOMCAT_DIR).
In podman you can do nice tricks with existing containers (podman unshare, podman mount), but remember, if you recreate the container, you will loose all the changes. So when you are OK with the changes, it's best to make your own image from that container (podman commit) and use that image instead of original repository image.
I also made changes to the share and also then you need to add proxy (Apache HTTPD or nginx) to handle ports 8080/8443.
podman unshare MOUNT_DIR=`podman mount share` TOMCAT_DIR=$MOUNT_DIR/usr/local/tomcat chown -R 33000 $TOMCAT_DIR $MOUNT_DIR/usr/java/openjdk-11.0.7+10/bin/java -jar $TOMCAT_DIR/alfresco-mmt/alfresco-mmt*.jar uninstall org.alfresco.integrations.share.google.docs $TOMCAT_DIR/webapps/share -nobackup -force rm $TOMCAT_DIR/amps_share/alfresco-googledrive-share-3.2.0.amp cp $HOME/share-amps/*.amp $TOMCAT_DIR/amps_share/ $MOUNT_DIR/usr/java/openjdk-11.0.7+10/bin/java -jar $TOMCAT_DIR/alfresco-mmt/alfresco-mmt*.jar install $TOMCAT_DIR/amps_share $TOMCAT_DIR/webapps/share -directory -nobackup -force sed -i 's@<show-authorization-status>true</show-authorization-status>@<show-authorization-status>false</show-authorization-status>@' $TOMCAT_DIR/shared/classes/alfresco/web-extension/share-config-custom.xml TOMCAT_SERVER_PORT=6005 TOMCAT_HTTP_PORT=6080 TOMCAT_SSL_PORT=6443 TOMCAT_AJP_PORT=6009 TOMCAT_JPDA_PORT=6000 sed -i "s/<Server\ port=\"8005\"\ shutdown=\"SHUTDOWN\">/<Server\ port=\"$TOMCAT_SERVER_PORT\"\ shutdown=\"SHUTDOWN\">/g" $TOMCAT_DIR/conf/server.xml sed -i "s/port=\"8080\"\ protocol=\"HTTP\/1.1\"/port=\"$TOMCAT_HTTP_PORT\"\ protocol=\"HTTP\/1.1\"/g" $TOMCAT_DIR/conf/server.xml sed -i "s/\ <Connector\ port=\"8443\"/\ <Connector port=\"$TOMCAT_SSL_PORT\"/g" $TOMCAT_DIR/conf/server.xml sed -i "s/\ <Connector\ port=\"8009\"\ protocol=\"AJP\/1.3\"/\ <Connector\ port=\"$TOMCAT_AJP_PORT\"\ protocol=\"AJP\/1.3\"\ /g" $TOMCAT_DIR/conf/server.xml sed -i "s/redirectPort=\"8443\"/redirectPort=\"$TOMCAT_SSL_PORT\"/g" $TOMCAT_DIR/conf/server.xml podman umount share
First sed with show-authorization-status fixes nasty bug in official docker image, which prevents admin from user management in Share.
podman pod start dms podman stats # to see the resource usage podman pod stop dms
dms or DMS is Document Management System in case anyone wonders why I used that 
Inspiration taken from https://github.com/abhinavmishra14/change-acs-share-port-demo
