docker container fails to create because of volume

I have the following docker compose file:

version: "3.6"
services:
  db:
    image: "mcr.microsoft.com/mssql/server"
    user: root
    environment:
      SA_PASSWORD: "supersecure"
      ACCEPT_EULA: 'y'
    ports:
      - "1433:1433"
    volumes:
      - ./db:/var/opt/mssql
volumes: 
  db:
    driver: local

When I try to run it, it fails and the following logs are what I see via Docker Desktop:

Attaching to server_db_1

db_1 | SQL Server 2019 will run as non-root by default.

db_1 | This container is running as user root.

db_1 | Your master database file is owned by root.

db_1 | To learn more visit https://go.microsoft.com/fwlink/?linkid=2099216.

db_1 | This program has encountered a fatal error and cannot continue running at Tue Mar 30 14:33:43 2021

db_1 | The following diagnostic information is available:

db_1 |

db_1 | Reason: 0x00000007

db_1 | Status: 0xc000014c

db_1 | Message: Corruption detected in persistent registry: \SystemRoot\lsvcid.hiv.

db_1 | Stack Trace:

db_1 | file://package4/windows/system32/sqlpal.dll+0x000000000029776C

db_1 | file://package4/windows/system32/sqlpal.dll+0x0000000000296A50

db_1 | file://package4/windows/system32/sqlpal.dll+0x000000000029462C

db_1 | file://package4/windows/system32/sqlpal.dll+0x0000000000294804

db_1 | file://package4/windows/system32/sqlpal.dll+0x0000000000293660

db_1 | file://package4/windows/system32/sqlpal.dll+0x0000000000292170

db_1 | file://package4/windows/system32/sqlpal.dll+0x00000000003543B1

db_1 | Process: 11 - sqlservr

db_1 | Thread: 15 (application thread 0x4)

db_1 | Instance Id: 461256be-50fe-44ca-8448-e871abce60a6

db_1 | Crash Id: b59e1c31-56bd-4c32-83bb-1589cc4ae460

db_1 | Build stamp: 8c201b336a2d5ea8f32b4655d414097e63db40c5a3bda5d146d8f480ca292e60

db_1 | Distribution: Ubuntu 18.04.5 LTS

db_1 | Processors: 6

db_1 | Total Memory: 8351440896 bytes

db_1 | Timestamp: Tue Mar 30 14:33:43 2021

db_1 | Last errno: 19

db_1 | Last errno text: No such device

db_1 |

After it dies, I see that it has created the volume:

admins-Mac-mini-3:server admin$ docker volume ls
DRIVER    VOLUME NAME
local     server_db
admins-Mac-mini-3:server admin$ 

When I try to create the container without the volume, it works just fine. But I don't know what I'm doing wrong.