container: rework bind mount directory permissions, move from volume syntax to mount syntax, add single file template volumes

roles/container/tasks/database.yml

@@ -8,6 +8,7 @@
       POSTGRES_PASSWORD: "{{ database_passwords[docker_service_name] }}"
     db_container_data: /var/lib/postgresql/data
   when: docker_database == 'postgres'
+
 - name: Set mariadb container vars
   set_fact:
     db_container_image: mariadb:10
@@ -20,11 +21,13 @@
     db_container_data: /var/lib/mysql
     db_image_port: 3306
   when: docker_database == 'mariadb'
+
 - name: Set mongo container vars
   set_fact:
     db_container_image: 'mongo:latest'
     db_container_data: /data/db
   when: docker_database == 'mongo'
+
 - name: Set db published ports var
   set_fact:
     db_published_ports: ["127.0.0.1:{{ ports[docker_service_name].db }}:{{ db_image_port }}"]