comms: add Element host-config entrypoint script

services/comms/helmrelease.yaml

@@ -383,16 +383,14 @@ spec:
         participant_limit: 16
         brand: Othrys Call
     extraVolumes:
-      - name: element-config-host
+      - name: element-host-config
         configMap:
-          name: othrys-element-element-web
-          items:
-            - key: config.json
-              path: config.live.bstein.dev.json
+          name: othrys-element-host-config
+          defaultMode: 0555
     extraVolumeMounts:
-      - name: element-config-host
-        mountPath: /tmp/element-web-config/config.live.bstein.dev.json
-        subPath: config.live.bstein.dev.json
+      - name: element-host-config
+        mountPath: /docker-entrypoint.d/20-host-config.sh
+        subPath: 20-host-config.sh
         readOnly: true
 
     ingress:

services/comms/kustomization.yaml

@@ -63,6 +63,11 @@ configMapGenerator:
       - bot.py=scripts/atlasbot/bot.py
     options:
       disableNameSuffixHash: true
+  - name: othrys-element-host-config
+    files:
+      - 20-host-config.sh=scripts/element-host-config.sh
+    options:
+      disableNameSuffixHash: true
   - name: atlas-kb
     files:
       - INDEX.md=knowledge/INDEX.md

services/comms/scripts/element-host-config.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+HOST_CONFIG="/tmp/element-web-config/config.live.bstein.dev.json"
+BASE_CONFIG="/tmp/element-web-config/config.json"
+
+if [[ -f "$BASE_CONFIG" ]]; then
+  cp -f "$BASE_CONFIG" "$HOST_CONFIG"
+fi