feat: add default backend for ingress

[markphelps]

Fixes issue described in https://community.flipt.io/t/helm-nil-pointer-evaluating-interface-servicename/90/2

[Copilot]

Pull Request Overview

This PR adds a default backend configuration for the ingress, addressing a previously reported nil pointer issue. Key changes include:

• New documentation in README.md outlining ingress configuration.
• Updates to the ingress template to provide default backend values.
• A version bump in Chart.yaml and supplementary updates in values.yaml and the chart README to support the new feature.

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
README.md	Added documentation for ingress configuration
charts/flipt/templates/ingress.yaml	Updated template to set default backend values and service port
charts/flipt/values.yaml	Documented the optional backend configuration and its defaults
charts/flipt/README.md	Linked to higher-level README and values.yaml for more information
charts/flipt/Chart.yaml	Bumped the chart version to reflect the new feature

Comments suppressed due to low confidence (1)

charts/flipt/templates/ingress.yaml:60

• Similarly, using default "" for .backend here could introduce nil pointer errors. Switch to (default dict .backend) to match the handling of servicePort.

serviceName: {{ default $fullName (default "" .backend).serviceName }}

[Copilot]

Pull Request Overview

This PR adds a default backend configuration for ingress to address a nil pointer issue encountered during Helm deployments. It updates the values and ingress templates to use default fallbacks, bumps the chart version, and enhances documentation for ingress configuration.

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
charts/flipt/values.yaml	Added comments to clarify optional backend configuration in the ingress.
charts/flipt/templates/ingress.yaml	Refactored default handling using the default dict pattern to avoid nil pointers.
charts/flipt/Chart.yaml	Bumped the chart version from 0.81.0 to 0.82.0.
charts/flipt/README.md	Updated docs to include examples for ingress configuration.
README.md	Expanded overall documentation with detailed ingress configuration info.

Comments suppressed due to low confidence (1)

charts/flipt/templates/ingress.yaml:52

• [nitpick] Consider using a with block to assign a local variable for (default dict .backend) to improve readability and reduce repetition in accessing backend fields.

name: {{ default $fullName ((default dict .backend).serviceName) }}