feat(charts/paperless-ngx): use official container images for postgres and redis per default instead of bitnami images

[KoiFresh]

What this PR does / why we need it

Use the official redis and postgres container image instead of deprecated bitnami container images.

Bitnami changed their image catalog and how they will publish their secure images. Duo to this, secure images are no longer available for free. Bitnami still publishes the latest version for development only, and old images will still be available under docker.io/bitnamilegacy. Images like docker.io/bitnami/redis:7.2.5-debian-12-r0 which are referenced from the bitnami redis helm chart are no longer available. The old bitnami images are still available under docker.io/bitnamilegacy/redis:7.2.5-debian-12-r0, but they will not publish new tags.

Special notes for your reviewer

Postgres additionally needs an extra volume mount at /var/run/postgresql since this is where postgres puts it pid/socket in order to keep a read only root filesystem. As an alternative the read only root filesystem could be set to false with

postgresql:
  primary:
    containerSecurityContext:
      readOnlyRootFilesystem: false

I tested the chart with updated images, which worked well, but eventually it is also necessary to set

global: 
  security: 
    allowInsecureImages: true

to suppress the warning introduced with bitnami/charts#30850, which I could not reproduce.

Additionally you could take a look at this commit of the authentik helm chart, which alos replaced the redis and postgres bitnami container images with official images.

[github-actions]

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[CyberAustin]

This is also needed for linkwarden, assuming anyone actually maintains this repo anymore

[KoiFresh]

This is also needed for linkwarden, assuming anyone actually maintains this repo anymore

Yes, there are more charts in this repository using the bitnami postgres chart with the legacy image:

• cachet
• linkwarden
• activepieces
• paperless-ngx (this pr)

but i looks like this repo is no longer maintained

[CyberAustin]

This is also needed for linkwarden, assuming anyone actually maintains this repo anymore

Yes, there are more charts in this repository using the bitnami postgres chart with the legacy image:

* cachet

* linkwarden

* activepieces

* paperless-ngx (this pr)

but i looks like this repo is no longer maintained

Sad, as it is the first thing that pops up on artifacthub when searching for Linkwarden.