Metabase docker container on k8s doesn't connec to MySQL

I deployed a docker container trough docker-compose to my docker hub, then I made the pull of that image and I deployed on a k8s pod.

But the problem is that when the container starts, it doesn't make any signal that is connecting or detecting the env variables to connect to the mysql database that is on a AWS RDS.

When I make the "make up" on local, the container connects without problem.

I don't know what I'm missing.

This is my docker-compose:

    container_name: metabase-app
    image: metabase/metabase:latest
      - MB_DB_TYPE=mysql
      - MB_DB_DBNAME=dbname
      - MB_DB_PORT=3306
      - MB_DB_USER=dbuser
      - MB_DB_PASS=dbpass
      - MB_DB_HOST=dbhost
      - "3000:3000"
      - "./metabase-data:/metabase-data"

And this is my k8s deploy

        - name: metabase
          image: mydockerhubrepo/mymetabaseimage:latest
          imagePullPolicy: Always
            - containerPort: 3000

This is on localhost, on my machine connecting to the production database on mysql:

But on production, on the live server, not even an error, but it goes straight with the h2:

you don't seem to have a configset on your k8s deployment, if Metabase doesn't see env vars it will use H2