website/blog: add draft for blog about fletcher joining

[tanberry]

Welcome Fletcher blog!

• The documentation has been updated
• The documentation has been formatted (make website)

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Images automagically compressed by Calibre's image-actions ✨

Compression reduced images by 43.7%, saving 48.95 KB.

Filename	Before	After	Improvement	Visual comparison
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210 images did not require optimisation.

[github-actions]

authentik PR Installation instructions

Instructions for docker-compose

Add the following block to your .env file:

AUTHENTIK_IMAGE=ghcr.io/goauthentik/dev-server
AUTHENTIK_TAG=gh-ghcr.io/goauthentik/dev-server:gh-d7c27a3429e8490d08157e72d1050a04dc1b8335
AUTHENTIK_OUTPOSTS__CONTAINER_IMAGE_BASE=ghcr.io/goauthentik/dev-%(type)s:gh-%(build_hash)s

For arm64, use these values:

AUTHENTIK_IMAGE=ghcr.io/goauthentik/dev-server
AUTHENTIK_TAG=gh-ghcr.io/goauthentik/dev-server:gh-d7c27a3429e8490d08157e72d1050a04dc1b8335-arm64
AUTHENTIK_OUTPOSTS__CONTAINER_IMAGE_BASE=ghcr.io/goauthentik/dev-%(type)s:gh-%(build_hash)s

Afterwards, run the upgrade commands from the latest release notes.

Instructions for Kubernetes

Add the following block to your values.yml file:

authentik:
    outposts:
        container_image_base: ghcr.io/goauthentik/dev-%(type)s:gh-%(build_hash)s
image:
    repository: ghcr.io/goauthentik/dev-server
    tag: gh-ghcr.io/goauthentik/dev-server:gh-d7c27a3429e8490d08157e72d1050a04dc1b8335

For arm64, use these values:

authentik:
    outposts:
        container_image_base: ghcr.io/goauthentik/dev-%(type)s:gh-%(build_hash)s
image:
    repository: ghcr.io/goauthentik/dev-server
    tag: gh-ghcr.io/goauthentik/dev-server:gh-d7c27a3429e8490d08157e72d1050a04dc1b8335-arm64

Afterwards, run the upgrade commands from the latest release notes.