L2SS-744: Persist archived data

Closes L2SS-744

docker-compose/archiver-timescale.yml

 version: '2'
 
+volumes:
+  archiver-timescale-data: {}
+
 services:
   archiver-timescale:
     image: timescaledb
@@ -12,6 +15,8 @@ services:
       - "5432:5432/tcp"
     extra_hosts:
       - "host.docker.internal:host-gateway"
+    volumes:
+      - alerta-postgres-data:/var/lib/postgresql/data
     depends_on:
       - databaseds
     environment: