Postgres exit code 127

[TaterFPV]

I installed Mealie with Postgres for SQL using Portainer on my Synology DS923+ a few months ago and it has been working great.
I accidentally upgraded the mealie and mealie-db through the Container Manager in DSM instead of Portainer and now the mealie-db container starts and immediately stops with exit code 127.

the log for the mealie-db shows this:

PostgreSQL Database directory appears to contain a database; Skipping initialization
/usr/local/bin/docker-entrypoint.sh: line 351: exec: postgres: not found

The compose file used in Portainer:

`version: "3.9"
services:
db:
image: postgres
container_name: Mealie-DB
hostname: mealie-db
mem_limit: 1g
cpu_shares: 768
security_opt:
- no-new-privileges:true
healthcheck:
test: ["CMD", "pg_isready", "-q", "-d", "mealie", "-U", "mealieuser"]
timeout: 45s
interval: 10s
retries: 10
volumes:
- /volume1/docker/mealie/db:/var/lib/postgresql/data:rw
environment:
POSTGRES_DB: mealie
POSTGRES_USER: mealieuser
POSTGRES_PASSWORD: mealiepass
restart: on-failure:5

mealie:
image: ghcr.io/mealie-recipes/mealie:nightly
container_name: Mealie
hostname: mealie
mem_limit: 3g
cpu_shares: 768
security_opt:
- no-new-privileges:true
read_only: true
ports:
- 9925:9000
volumes:
- /volume1/docker/mealie/data:/app/data/:rw
environment:
TZ: America/Toronto
PUID: 1026
PGID: 100
MAX_WORKERS: 1
WEB_CONCURRENCY: 1
ALLOW_SIGNUP: true #or false
BASE_URL: http://192.168.99.25 #or https://mealie.yourname.synology.me
DB_ENGINE: postgres
POSTGRES_USER: mealieuser
POSTGRES_PASSWORD: mealiepass
POSTGRES_SERVER: mealie-db
POSTGRES_PORT: 5432
POSTGRES_DB: mealie
SMTP_HOST:
SMTP_PORT: 587
SMTP_FROM_NAME: Mealie
SMTP_AUTH_STRATEGY: TLS # Options: 'TLS', 'SSL', 'NONE'`

I am not sure what to do here as I am Linuxly and Dockerly challenged. Should I just make a new container for mealie and do proper backups moving forward? I can console into the mealie container as it is running fine but not mealie-db. I have less than 50 recipes entered so not the end of the world but if there's anyway to get this running without starting from scratch, I would be very grateful.