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+TUNNEL_TOKEN=
+
+# Domain of service
+DOMAIN=erratic.cc
+
+# Container settings
+## Timezone inside the containers. The value needs to be in the form 'Europe/Berlin'.
+## A list of these tz database names can be looked up at Wikipedia
+## https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
+TZ=America/Edmonton
+RESTART_POLICY=unless-stopped
+
+# Postgres settings
+## Documentation for this image and available settings can be found on hub.docker.com
+## https://hub.docker.com/_/postgres
+## Please keep in mind this will create a superuser and it's recommended to use a less privileged
+## user to connect to the database.
+## A guide on how to change the database user to a nonsuperuser can be found in docs/creation-of-nonsuperuser.md
+POSTGRES_IMAGE_TAG=13-alpine
+POSTGRES_DATA_PATH=./volumes/db/var/lib/postgresql/data
+
+POSTGRES_USER=mmuser
+POSTGRES_PASSWORD=
+POSTGRES_DB=mattermost
+
+# Mattermost settings
+## Inside the container the uid and gid is 2000. The folder owner can be set with
+## `sudo chown -R 2000:2000 ./volumes/app/mattermost`.
+MATTERMOST_CONFIG_PATH=./volumes/app/mattermost/config
+MATTERMOST_DATA_PATH=./volumes/app/mattermost/data
+MATTERMOST_LOGS_PATH=./volumes/app/mattermost/logs
+MATTERMOST_PLUGINS_PATH=./volumes/app/mattermost/plugins
+MATTERMOST_CLIENT_PLUGINS_PATH=./volumes/app/mattermost/client/plugins
+MATTERMOST_BLEVE_INDEXES_PATH=./volumes/app/mattermost/bleve-indexes
+
+## Bleve index (inside the container)
+MM_BLEVESETTINGS_INDEXDIR=/mattermost/bleve-indexes
+
+## This will be 'mattermost-enterprise-edition' or 'mattermost-team-edition' based on the version of Mattermost you're installing.
+MATTERMOST_IMAGE=mattermost-team-edition
+## Update the image tag if you want to upgrade your Mattermost version. You may also upgrade to the latest one. The example is based on the latest Mattermost ESR version.
+MATTERMOST_IMAGE_TAG=9.7
+
+## Make Mattermost container readonly. This interferes with the regeneration of root.html inside the container. Only use
+## it if you know what you're doing.
+## See https://github.com/mattermost/docker/issues/18
+MATTERMOST_CONTAINER_READONLY=false
+
+## The app port is only relevant for using Mattermost without the nginx container as reverse proxy. This is not meant
+## to be used with the internal HTTP server exposed but rather in case one wants to host several services on one host
+## or for using it behind another existing reverse proxy.
+APP_PORT=8065
+
+## Configuration settings for Mattermost. Documentation on the variables and the settings itself can be found at
+## https://docs.mattermost.com/administration/config-settings.html
+## Keep in mind that variables set here will take precedence over the same setting in config.json. This includes
+## the system console as well and settings set with env variables will be greyed out.
+
+## Below one can find necessary settings to spin up the Mattermost container
+MM_SQLSETTINGS_DRIVERNAME=postgres
+MM_SQLSETTINGS_DATASOURCE=postgres://${POSTGRES_USER}:${POSTGRES_PASSWORD}@postgres:5432/${POSTGRES_DB}?sslmode=disable&connect_timeout=10
+
+## Example settings (any additional setting added here also needs to be introduced in the docker-compose.yml)
+MM_SERVICESETTINGS_SITEURL=https://${DOMAIN}
+
+MM_EMAILSETTINGS_SMTPSERVER=smtp.mailgun.org
+MM_EMAILSETTINGS_SMTPPORT=465
+MM_EMAILSETTINGS_ENABLESMTPAUTH=true
+MM_EMAILSETTINGS_SMTPUSERNAME=mattermost@erratic.cc
+MM_EMAILSETTINGS_SMTPPASSWORD=
+MM_EMAILSETTINGS_CONNECTIONSECURITY=TLS
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