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README.md

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+# Image Size Optimization Challenge (Node.js)
+
+This project compares Docker image sizes and build times using different optimization techniques.
+
+## Techniques Used
+
+- ✅ Basic Dockerfile
+- ✅ Multi-stage Build
+- ✅ Alpine vs Ubuntu Base Images
+- ✅ .dockerignore Optimization
+- ✅ Layer Caching Strategies
+
+## Folder Structure
+