refactor: move 'image' properties up in the values.yaml file

- Update the version number in the `Chart.yaml` file from `1.3.0` to `1.3.1`
- Update the image name and tag in the `deployment.yaml` file
- Add a new section for image details in the `values.yaml` file with repository, tag, and pull policy
- Remove the `image` section from the `reloader` block in the `values.yaml` file, since the image details were moved to a new image section
- Modify the `containerSecurityContext` section in the `deployment.yaml` file