Update nixpkgs.

See merge request !223

Monitoring/tahoe metrics collector: Add systemd dependency declarations

See merge request !220

Thanks go out to @tomprince!

Weekly nixpkgs update.

See merge request !221

Update nixpkgs.

See merge request !219

Tryfix the starting of the timer before tahoe is updated.

Update to version of ZKAPAuthorizer that includes a Tahoe with openmetrics support.

Closes #90

See merge request !218

Add dashboard for tahoe-lafs

Closes privatestorageops#396

See merge request !217

This adds a detailed dashboard for tahoe-lafs running on one node.

Monitoring: Add regular scraping for Tahoe OpenMetrics statistics

Closes privatestorageops#285

See merge request !216

Update privatestorage.

See merge request !208

Update nixpkgs.

See merge request !214

add a rst version of our design template

See merge request !213

Fix https alerting

See merge request !210

Monitor MegaRAID on our storage nodes

Closes privatestorageops#19

See merge request !202

This is based on the version in google docs.
It has some changes informed by our experience using the template so far.

Update ops docs: No need for manually creating TLS keys for the payment server anymore

See merge request !212

Thanks @tomprince!

Thanks to @tomprince for the suggestion.

Since !146 (merged on 2021-09-07) we let the NixOS Let's Encrypt integration
with NGINX handle TLS.  That integration cares for interim self-signed certs
until real ones are aquired.  The section about creating TLS certs by hand so
the service will start is obsolote.

words about recovering from backup

Closes privatestorageops#276

See merge request !206

Don't literalExample all the examples

See merge request !209

Copy everything from how the issuer does it.

literalExample is deprecated and overused. See:
https://whetstone.privatestorage.io/privatestorage/PrivateStorageio/-/merge_requests/201#note_16966