v4.0.0.2

Dockerfile

@@ -1,3 +1,4 @@
+# syntax=docker/dockerfile:1.7
 ARG APP_VERSION=4.0.1
 
 FROM node:22-alpine AS builder
@@ -5,13 +6,30 @@ ARG APP_VERSION
 
 WORKDIR /app
 
-COPY package.json ./
-COPY package-lock.json ./
+# 1. Dependencies — only re-runs when package*.json change.
+COPY package.json package-lock.json ./
 RUN npm ci
 
+# 2. Image assets in their own layer. Enhanced-img content-hashes its inputs,
+#    so when these files are unchanged the BuildKit cache mount below replays
+#    the previous WebP/AVIF outputs instead of regenerating them.
+COPY src/lib/images ./src/lib/images
+COPY static ./static
+
+# 3. Build config (changes rarely).
+COPY svelte.config.js vite.config.ts tsconfig.json ./
+
+# 4. Everything else. Component-only edits invalidate this layer but the vite
+#    transform cache below keeps the expensive image pipeline warm.
 COPY . .
+
 RUN node --experimental-strip-types --import="file:///app/scripts/sveltekit-resolver.mjs" scripts/export-homepage-content.mjs
-RUN npm run build
+
+# Persist vite's transform cache across builds. Enhanced-img stores its
+# generated raster variants here keyed by source-image hash, so unchanged
+# images skip the sharp/resize/encode pass entirely.
+RUN --mount=type=cache,target=/app/node_modules/.vite,sharing=locked \
+    npm run build
 
 FROM node:22-alpine AS runner
 ARG APP_VERSION