chore: Add cross-engine build and push script

build.sh

@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+set -e
+
+# Configuration with smart defaults (overridable via environment variables)
+REGISTRY=${REGISTRY:-"quay.atyg.org"}
+NAMESPACE=${NAMESPACE:-"library"}
+IMAGE_NAME=${IMAGE_NAME:-"custom-nas-web"}
+TAG=${TAG:-"latest"}
+
+FULL_IMAGE_NAME="$REGISTRY/$NAMESPACE/$IMAGE_NAME:$TAG"
+
+# Auto-detect container engine (podman or docker)
+if command -v podman &> /dev/null; then
+    ENGINE="podman"
+elif command -v docker &> /dev/null; then
+    ENGINE="docker"
+else
+    echo "❌ Error: Neither podman nor docker found in PATH."
+    exit 1
+fi
+
+echo "🚀 Building image using $ENGINE..."
+echo "📦 Target: $FULL_IMAGE_NAME"
+
+# Build the image
+$ENGINE build -t "$FULL_IMAGE_NAME" .
+
+# Handle optional push flag
+if [[ "$1" == "--push" || "$2" == "--push" ]]; then
+    echo "☁️  Pushing to registry..."
+    $ENGINE push "$FULL_IMAGE_NAME"
+    echo "✅ Push complete!"
+else
+    echo "✅ Build complete!"
+    echo "💡 Tip: To build and push in one step, run: ./build.sh --push"
+fi