Merge branch '352.cachix' into 323.continuous-deployment

.gitlab-ci.yml

ci-tools/count-vulnerabilities

ci-tools/vulnerability-scan

docs.nix

docs/source/ops/generating-keys.rst

morph/README.rst

morph/grid/local/README.rst

morph/grid/local/Vagrantfile

morph/grid/local/config.json

morph/grid/local/grid.nix

morph/grid/local/private-keys/monitoringvpn/172.23.23.11.key

morph/grid/local/private-keys/monitoringvpn/172.23.23.12.key

morph/grid/local/private-keys/monitoringvpn/172.23.23.13.key

morph/grid/local/private-keys/monitoringvpn/preshared.key

morph/grid/local/private-keys/monitoringvpn/server.key

morph/grid/local/private-keys/payments-localdev-ssl/cert.pem

...h/grid/local/private-keys/payments-localdev-ssl/chain.pem

...grid/local/private-keys/payments-localdev-ssl/privkey.pem

morph/grid/local/private-keys/ristretto.signing-key

morph/grid/local/private-keys/stripe.secret