Migrate to quadlets

roles/mastodon/templates/database.container.j2

@@ -0,0 +1,18 @@
+[Unit]
+Description=Mastodon PostgreSQL database
+
+[Container]
+ContainerName=database
+Image=docker.io/library/postgres:17
+Network=mastodon_internal.network
+Environment=POSTGRES_DB=mastodon
+Environment=POSTGRES_USER={{ mastodon_database.username }}
+Environment=POSTGRES_PASSWORD={{ mastodon_database.password }}
+Volume=/home/apps/mastodon/postgresql:/var/lib/postgresql/data:Z
+HealthCmd=pg_isready -U postgres
+
+[Service]
+Restart=always
+
+[Install]
+WantedBy=default.target