diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..97b8932
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,78 @@
+# https://docs.docker.com/compose/environment-variables/
+
+version: "2.4"
+
+services:
+  postgres:
+    image: postgres:${POSTGRES_IMAGE_TAG}
+    restart: ${RESTART_POLICY}
+    security_opt:
+      - no-new-privileges:true
+    pids_limit: 100
+    read_only: true
+    tmpfs:
+      - /tmp
+      - /var/run/postgresql
+    volumes:
+      - ${POSTGRES_DATA_PATH}:/var/lib/postgresql/data
+    environment:
+      # timezone inside container
+      - TZ
+
+      # necessary Postgres options/variables
+      - POSTGRES_USER
+      - POSTGRES_PASSWORD
+      - POSTGRES_DB
+    networks:
+      - mat_back
+
+  mattermost:
+    depends_on:
+      - postgres
+    image: mattermost/${MATTERMOST_IMAGE}:${MATTERMOST_IMAGE_TAG}
+    restart: ${RESTART_POLICY}
+    security_opt:
+      - no-new-privileges:true
+    pids_limit: 200
+    read_only: ${MATTERMOST_CONTAINER_READONLY}
+    tmpfs:
+      - /tmp
+    volumes:
+      - ${MATTERMOST_CONFIG_PATH}:/mattermost/config:rw
+      - ${MATTERMOST_DATA_PATH}:/mattermost/data:rw
+      - ${MATTERMOST_LOGS_PATH}:/mattermost/logs:rw
+      - ${MATTERMOST_PLUGINS_PATH}:/mattermost/plugins:rw
+      - ${MATTERMOST_CLIENT_PLUGINS_PATH}:/mattermost/client/plugins:rw
+      - ${MATTERMOST_BLEVE_INDEXES_PATH}:/mattermost/bleve-indexes:rw
+      # When you want to use SSO with GitLab, you have to add the cert pki chain of GitLab inside Alpine
+      # to avoid Token request failed: certificate signed by unknown authority 
+      # (link: https://github.com/mattermost/mattermost-server/issues/13059 and https://github.com/mattermost/docker/issues/34)
+      # - ${GITLAB_PKI_CHAIN_PATH}:/etc/ssl/certs/pki_chain.pem:ro
+    environment:
+      # timezone inside container
+      - TZ
+
+      # necessary Mattermost options/variables (see env.example)
+      - MM_SQLSETTINGS_DRIVERNAME
+      - MM_SQLSETTINGS_DATASOURCE
+
+      # necessary for bleve
+      - MM_BLEVESETTINGS_INDEXDIR
+
+      # additional settings
+      - MM_SERVICESETTINGS_SITEURL
+      - VIRTUAL_HOST=mat.airdog.site
+      - LETSENCRYPT_HOST=mat.airdog.site
+      - LETSENCRYPT_EMAIL=lets@treillis.mailer.me
+      - VIRTUAL_PORT=8065
+      - ${CALLS_PORT}:${CALLS_PORT}/udp
+      - ${CALLS_PORT}:${CALLS_PORT}/tcp
+
+    networks:
+      - mat_back
+      - acme-companion_proxy-tier
+
+networks:
+  mat_back:
+  acme-companion_proxy-tier:
+    external: true