-PEERTUBE_DB_USERNAME=postgres_user
-PEERTUBE_DB_PASSWORD=postgres_password
+POSTGRES_USER=peertube
+POSTGRES_PASSWORD=peertube
+POSTGRES_DB=peertube
+PEERTUBE_DB_USERNAME=$(POSTGRES_USER)
+PEERTUBE_DB_PASSWORD=$(POSTGRES_PASSWORD)
+PEERTUBE_DB_HOSTNAME=postgres
PEERTUBE_WEBSERVER_HOSTNAME=domain.tld
PEERTUBE_WEBSERVER_PORT=443
PEERTUBE_WEBSERVER_HTTPS=true
PEERTUBE_SMTP_TLS=false
PEERTUBE_SMTP_DISABLE_STARTTLS=false
PEERTUBE_ADMIN_EMAIL=admin@domain.tld
+POSTFIX_myhostname=${PEERTUBE_WEBSERVER_HOSTNAME}
# /!\ Prefer to use the PeerTube admin interface to set the following configurations /!\
#PEERTUBE_SIGNUP_ENABLED=true
#PEERTUBE_TRANSCODING_ENABLED=true