improvement(helm): add additional instructions for AWS deployments (#851)

helm/sim/README.md

@@ -117,11 +117,24 @@ Each cloud platform example includes optimized configurations:
 
 ### AWS (EKS)
 - **Storage**: EBS GP3 volumes for optimal performance
+- **EBS CSI Driver**: Required for persistent storage (install as EKS add-on)
 - **Node Selectors**: Instance type targeting (`t3.large`, `r5.large`, `g4dn.xlarge`)
 - **GPU Support**: GPU-optimized instances (G4, P3 families)
 - **Ingress**: Application Load Balancer (ALB) with AWS Certificate Manager
 - **IAM**: Service Account annotations for IAM roles
 
+**Prerequisites for AWS:**
+```bash
+# Install EBS CSI driver add-on
+aws eks create-addon --cluster-name your-cluster --addon-name aws-ebs-csi-driver
+
+# Create IAM role for EBS CSI driver (if using IRSA)
+aws iam create-role --role-name AmazonEKS_EBS_CSI_DriverRole \
+  --assume-role-policy-document file://ebs-csi-trust-policy.json
+aws iam attach-role-policy --role-name AmazonEKS_EBS_CSI_DriverRole \
+  --policy-arn arn:aws:iam::aws:policy/service-role/AmazonEBSCSIDriverPolicy
+```
+
 ### GCP (GKE)
 - **Storage**: Persistent Disk with standard and premium options
 - **Node Selectors**: Node pool and machine family targeting

helm/sim/templates/deployment-app.yaml

@@ -38,10 +38,11 @@ spec:
         - name: migrations
           image: {{ include "sim.image" (dict "context" . "image" .Values.migrations.image) }}
           imagePullPolicy: {{ .Values.migrations.image.pullPolicy }}
-          command: ["bun", "run", "db:migrate"]
-          env:
-            - name: DATABASE_URL
-              value: {{ include "sim.databaseUrl" . | quote }}
+          command: ["/bin/bash", "-c"]
+          args:
+            - |
+              export DATABASE_URL="{{ include "sim.databaseUrl" . }}"
+              bun run db:migrate
           {{- if .Values.postgresql.enabled }}
           envFrom:
             - secretRef: