fix(chart): inject N8N_EDITOR_BASE_URL into containers

[krider2010]

Summary

• Fixes [Bug]: N8N_EDITOR_BASE_URL set in ConfigMap but never injected into any container (empty at runtime) #148. The chart was writing N8N_EDITOR_BASE_URL into the ConfigMap, but no template referenced it as a container env var, so the value never reached the running n8n process even though the ConfigMap looked right. Editor links, OAuth callbacks, etc. came back empty.
• Wires the key into the main / worker / webhook-processor containers via configMapKeyRef, matching how WEBHOOK_URL is already done, and gates it on the same condition configmap.yaml uses so we never reference a missing key.

Test plan

• helm lint charts/n8n
• helm template for three scenarios: ingress with hosts, webhook.url=https://… without ingress, and neither (env present, present, absent respectively)
• Installed on OrbStack with the reporter's values (webhook.url=https://n8n.example.com, ingress off, queue mode + webhook processor). Confirmed kubectl exec ... printenv N8N_EDITOR_BASE_URL returns the configured URL on main, worker, and webhook-processor pods.

Note for reviewers

Users on the documented config.extraEnv workaround will end up with the env name defined twice in the container spec. The *ConfigMapEnv helpers render before config.extraEnv, so in a Kubernetes env list the ConfigMap-sourced value wins. In practice the workaround value is the same URL the chart now derives, so behavior should be identical — but worth a release note.

[cubic-dev-ai]

No issues found across 1 file

Architecture diagram

sequenceDiagram
    participant User as User/values.yaml
    participant Chart as Chart Helm
    participant ConfigMap as ConfigMap Resource
    participant Pod as n8n Pod (main/worker/webhook)

    Note over User,Pod: NEW: N8N_EDITOR_BASE_URL Injection Flow

    User->>Chart: Provide configuration (ingress.enabled with hosts OR webhook.url)

    Chart->>ConfigMap: Render ConfigMap with N8N_EDITOR_BASE_URL key

    alt Condition: ingress with hosts OR webhook.url starting with "http"
        Note over ConfigMap: Key N8N_EDITOR_BASE_URL present
        Chart->>Pod: Inject env var via configMapKeyRef in container spec
        Note over Pod: NEW: N8N_EDITOR_BASE_URL available at runtime
    else Condition not met
        Note over ConfigMap: Key N8N_EDITOR_BASE_URL absent
        Chart->>Pod: No env var injected
        Note over Pod: Editor links/OAuth callbacks may be missing
    end

    Note over Pod: ConfigMap-sourced value takes precedence over extraEnv if both defined

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