Update Node.js to v21

See merge request !98

Update redis Docker tag to v7.2.3

See merge request !96

Update jordan/icinga2 Docker tag to v2.14.0

See merge request !85

Update wordpress Docker tag to v6.4.2

See merge request !97

Update lscr.io/linuxserver/heimdall Docker tag to v2021

See merge request !102

Update gitlab/gitlab-ce Docker tag to v16.7.0

See merge request !81

Update matrixdotorg/synapse Docker tag to v1.98.0

See merge request !88

# Conflicts:
#   webserver/docker_wordpress/templates/Dockerfile

Update nextcloud Docker tag to v27.1.3

See merge request !68

Update gitlab/gitlab-ce Docker tag to v15.11.13

See merge request !58

Update quay.io/hedgedoc/hedgedoc Docker tag to v1.9.9

See merge request !59

Update docker Docker tag to v24

See merge request !63

Update grafana/grafana Docker tag to v10

See merge request !64

Update wordpress Docker tag to v6.3.2

See merge request !60

Update ghcr.io/freifunkmuc/wg-access-server Docker tag to v0.10.1

See merge request !66

Update homeassistant/home-assistant Docker tag

See merge request !62