fix(stalwart): Add config.json to load web UI configuration

- Mount /etc/stalwart/config.json pointing to RocksDB
- Allows Stalwart to load configuration from web UI setup
- Resolves bootstrap mode loop

Refs: DEV-206

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/stalwart/stalwart-fresh-deployment.yaml

@@ -182,9 +182,9 @@ spec:
         volumeMounts:
         - name: data
           mountPath: /var/lib/stalwart
-        - name: config
-          mountPath: /opt/stalwart-mail/etc/config.toml
-          subPath: config.toml
+        - name: bootstrap-config
+          mountPath: /etc/stalwart/config.json
+          subPath: config.json
         resources:
           requests:
             memory: "512Mi"
@@ -212,9 +212,9 @@ spec:
       - name: data
         persistentVolumeClaim:
           claimName: stalwart-data
-      - name: config
+      - name: bootstrap-config
         configMap:
-          name: stalwart-config
+          name: stalwart-bootstrap-config
 ---
 apiVersion: networking.k8s.io/v1
 kind: Ingress