Huh....so the log is just an almost infinite loop of these:

jellystat-1     | Error: getaddrinfo ENOTFOUND jellystat-db
jellystat-1     |     at GetAddrInfoReqWrap.onlookupall [as oncomplete] (node:dns:120:26)
jellystat-1     | [JELLYSTAT] Database exists. Skipping creation
jellystat-1     | FS-related option specified for migration configuration. This resets migrationSource to default FsMigrations
jellystat-1     | FS-related option specified for migration configuration. This resets migrationSource to default FsMigrations
jellystat-1     | node:internal/process/promises:391
jellystat-1     |     triggerUncaughtException(err, true /* fromPromise */);
jellystat-1     |     ^
jellystat-1     | 
jellystat-1     | Error: getaddrinfo ENOTFOUND jellystat-db
jellystat-1     |     at GetAddrInfoReqWrap.onlookupall [as oncomplete] (node:dns:120:26) {
jellystat-1     |   errno: -3008,
jellystat-1     |   code: 'ENOTFOUND',
jellystat-1     |   syscall: 'getaddrinfo',
jellystat-1     |   hostname: 'jellystat-db'
jellystat-1     | }

Just for clarity's sake, here's my docker-compose.yml:

version: '3'
services:
  jellystat-db:
    image: postgres:15.2
    environment:
      POSTGRES_DB: 'jfstat'
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: mypassword
    volumes:
    - /postgres-data:/var/lib/postgresql/data # Mounting the volume
  jellystat:
    image: cyfershepard/jellystat:latest
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: MyJellystat
      POSTGRES_IP: jellystat-db
      POSTGRES_PORT: 5432
      JWT_SECRET: 'my-secret-jwt-key'
    ports:
      - "3000:3000" #Server Port
    volumes:
      - /backup-data:/app/backend/backup-data # Mounting the volume

    depends_on:
      - jellystat-db
    restart: unless-stopped
networks:
  default:

I literally haven't changed anything from default as it was a test, even the password fields.