add cache busting

build.sh

@@ -0,0 +1,41 @@
+#!/bin/sh
+set -e
+
+SRC="${SRC:-src}"
+DIST="${DIST:-dist}"
+
+# Clean and create dist
+rm -rf "$DIST"
+mkdir -p "$DIST"
+
+# Copy index.html
+cp "$SRC/index.html" "$DIST/index.html"
+
+# Cache-bust assets by appending a content hash to filenames
+for ext in css js jpeg png svg; do
+    for file in "$SRC"/*."$ext"; do
+        [ -f "$file" ] || continue
+        name=$(basename "$file" | sed "s/\.$ext$//")
+        hash=$(md5sum "$file" | cut -d' ' -f1)
+        newname="${name}.${hash}.${ext}"
+
+        cp "$file" "$DIST/$newname"
+
+        # Update references in HTML
+        case "$ext" in
+            css)
+                sed -i "s|href=\"${name}.${ext}\"|href=\"${newname}\"|g" "$DIST/index.html"
+                ;;
+            js)
+                sed -i "s|src=\"${name}.${ext}\"|src=\"${newname}\"|g" "$DIST/index.html"
+                ;;
+            jpeg|png|svg)
+                sed -i "s|\"${name}.${ext}\"|\"${newname}\"|g" "$DIST/index.html"
+                ;;
+        esac
+    done
+done
+
+echo "Build complete: $DIST/"
+echo "Assets with cache-busting hashes:"
+ls -1 "$DIST"