Documentation for basic installations

[edwbuck]

When deploying a known configuration of Tornjak with the SPIRE Helm Charts, an existing user had issues because the configuration had changed sufficiently that his prior approach which was successful failed.

We need documentation that describes the current desired approach for deploying SPIRE and SPIRE with Tornjak, so we can maintain those instructions, capturing the changes, permitting the distribution of the current approach.

This should be maintained along with the deployment testing, such that we deploy following our documentation instructions.

[mrsabath]

Prior to the recent updates, we were able to run the Tornjak deployment via:

.github/tests/tornjak/pre-install.sh
.github/tests/tornjak/install.sh

or

.github/tests/tornjak/pre-install.sh
helm install --namespace spire-server --values "examples/production/values.yaml" --values "examples/tornjak/values.yaml" spire charts/spire --render-subchart-notes --debug

As of right now, the default/basic deployment is much more complicated and keeps failing