Added youki build and fromatting of scripts

README.md

@@ -243,7 +243,9 @@ Services are migrated from existing `configs/zinit/` directory with proper initi
 ### Phase 6: Packaging
 1. Create `initramfs.cpio.xz` with XZ compression
 2. Build kernel with embedded initramfs
-3. Generate `vmlinuz.efi`
+3. Generate `vmlinuz.efi` (default kernel)
+4. Generate versioned kernel: `vmlinuz-{VERSION}-{ZINIT_HASH}.efi`
+5. Optionally upload versioned kernel to S3 (set `UPLOAD_KERNEL=true`)
 
 ## Testing
 
@@ -357,6 +359,72 @@ function build_myapp() {
 }
 ```
 
+### S3 Uploads (Kernel & RFS Flists)
+
+Automatically upload build artifacts to S3-compatible storage:
+
+#### Configuration
+
+Create `config/rfs.conf`:
+
+```bash
+S3_ENDPOINT="https://s3.example.com:9000"
+S3_REGION="us-east-1"
+S3_BUCKET="zos"
+S3_PREFIX="flists/zosbuilder"
+S3_ACCESS_KEY="YOUR_ACCESS_KEY"
+S3_SECRET_KEY="YOUR_SECRET_KEY"
+```
+
+#### Upload Kernel
+
+```bash
+# Enable kernel upload
+UPLOAD_KERNEL=true ./scripts/build.sh
+
+# Custom kernel subpath (default: kernel)
+KERNEL_SUBPATH=kernels UPLOAD_KERNEL=true ./scripts/build.sh
+```
+
+**Uploaded files:**
+- `s3://{bucket}/{prefix}/kernel/vmlinuz-{VERSION}-{ZINIT_HASH}.efi` - Versioned kernel
+- `s3://{bucket}/{prefix}/kernel/kernels.txt` - Text index (one kernel per line)
+- `s3://{bucket}/{prefix}/kernel/kernels.json` - JSON index with metadata
+
+**Index files:**
+The build automatically generates and uploads index files listing all available kernels in the S3 bucket. This enables:
+- Easy kernel selection in web UIs (dropdown menus)
+- Programmatic access without S3 API listing
+- Metadata like upload timestamp and kernel count (JSON format)
+
+**JSON index format:**
+```json
+{
+  "kernels": [
+    "vmlinuz-6.12.44-Zero-OS-abc1234.efi",
+    "vmlinuz-6.12.44-Zero-OS-def5678.efi"
+  ],
+  "updated": "2025-01-04T12:00:00Z",
+  "count": 2
+}
+```
+
+#### Upload RFS Flists
+
+```bash
+# Enable flist uploads
+UPLOAD_MANIFESTS=true ./scripts/build.sh
+```
+
+Uploaded as:
+- `s3://{bucket}/{prefix}/manifests/modules-{VERSION}.fl`
+- `s3://{bucket}/{prefix}/manifests/firmware-{TAG}.fl`
+
+#### Requirements
+
+- MinIO Client (`mcli` or `mc`) must be installed
+- Valid S3 credentials in `config/rfs.conf`
+
 ### Container Builds
 
 Build in isolated container: