feat: add S3 configuration and utility functions for blog image handling

Dockerfile

@@ -13,6 +13,14 @@ RUN npm ci
 # Copy project files
 COPY . .
 
+# Build arguments for environment variables
+ARG VITE_S3_ENDPOINT_BLOG
+ARG VITE_S3_BUCKET_BLOG
+
+# Set environment variables for Vite build
+ENV VITE_S3_ENDPOINT_BLOG=${VITE_S3_ENDPOINT_BLOG}
+ENV VITE_S3_BUCKET_BLOG=${VITE_S3_BUCKET_BLOG}
+
 # Build the application
 RUN npm run build