Chart contains references to raw.githubusercontent.com which prevents air-grapped installations

[ErikLundJensen]

Proposed functionality

The values.schema.json contains references to source outside of the chart. When deploying the chart in an air-gapped environment there should be no external dependencies.

Error: values don't meet the specifications of the schema(s) in the following chart(s): netbox: Get "https://raw.githubusercontent.com/bitnami/charts/master/bitnami/postgresql/values.schema.json": dial tcp 185.199.108.133:443: i/o timeout

There are two references in values.schema.json:

"allOf": [
        {
          "$ref": "https://raw.githubusercontent.com/bitnami/charts/master/bitnami/postgresql/values.schema.json"
        },

     "allOf": [
        {
          "$ref": "https://raw.githubusercontent.com/bitnami/charts/master/bitnami/redis/values.schema.json"
        },

Use case

Support air-gapped installation. Improves security as unknown content is not downloaded during installation.

[LeoColomb]

Thanks for filing this issue, @ErikLundJensen. Simply use the option --skip-schema-validation when using Helm install/upgrade command.