* Edit docs/maintenance-migrating.md: replace the numbering list with sections for each item

Also: add an ansible-playbook command with the stop tag as the main command to stop the Matrix services.

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Edit docs/maintenance-migrating.md: move the note under the header

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Update docs/maintenance-migrating.md

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Edit docs/maintenance-migrating.md: add a section "checking if services work"

The commit does not include the detail as having another similar section increases doubles effort to maintain them and increases possibility of causing discrepancy.

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Edit docs/maintenance-migrating.md: add a note about joining the support room on Matrix

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Edit docs/maintenance-migrating.md: replace hosts with inventory/hosts

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Edit docs/maintenance-migrating.md: instruction to run ansible-playbook commands locally

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Edit docs/maintenance-migrating.md: edit the check section

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Update docs/maintenance-migrating.md

Co-authored-by: Slavi Pantaleev <slavi@devture.com>

* Update docs/maintenance-migrating.md: reflect the review and edit a note for creating a temporary account on another server

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Minor rewording in maintenance-migrating.md

---------

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>
Co-authored-by: Suguru Hirahara <acioustick@noreply.codeberg.org>
Co-authored-by: Slavi Pantaleev <slavi@devture.com>

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

Annotate server migration with a note in regard to migration between different architectures and the need to dump/restore the database.

ot -> to

Changes to the original are:
- it tells people to stop and disable services, so that:
   - services won't be running while you are copying files
   - services won't accidentally start again later
- it does the file-copying in 1 step
- it does copying before running `--tags=setup-all`, so that existing files (SSL certificates, etc.) can be reused. Otherwise, the playbook starts from a blank slate, retrieves them anew, generates new signing keys anew, etc. Only to have those replaced by your own old backup later.
- it mentions DNS changes
- combines `--tags=setup-all,start` into a single step, thanks to the files being already copied