Restore postgres from backup file in docker

postgres-restore-docker

docker run --name foo-postgres -e POSTGRES_PASSWORD=mysecretpassword -d postgres
docker inspect -f '{{ json .Mounts }}' foo-postgres | python -m json.tool

```
[
    {
        "Destination": "/var/lib/postgresql/data",
        "Driver": "local",
        "Mode": "",
        "Name": "8ce3df1ef910ec01686401a1fc8cdfff729aa2cd88ccac852c436badab7f3dea",
        "Propagation": "",
        "RW": true,
        "Source": "/var/lib/docker/volumes/8ce3df1ef910ec01686401a1fc8cdfff729aa2cd88ccac852c436badab7f3dea/_data",
        "Type": "volume"
    }
]
```

docker cp db.tar foo-postgres:/var/lib/postgresql/data

docker exec foo-postgres psql -U postgres -l
```
                                 List of databases
   Name    |  Owner   | Encoding |  Collate   |   Ctype    |   Access privileges   
-----------+----------+----------+------------+------------+-----------------------
 postgres  | postgres | UTF8     | en_US.utf8 | en_US.utf8 | 
 template0 | postgres | UTF8     | en_US.utf8 | en_US.utf8 | =c/postgres          +
           |          |          |            |            | postgres=CTc/postgres
 template1 | postgres | UTF8     | en_US.utf8 | en_US.utf8 | =c/postgres          +
           |          |          |            |            | postgres=CTc/postgres
(3 rows)
```

docker exec foo-postgres pg_restore -U postgres -d postgres /var/lib/postgresql/data/db.tar -c