feat(ci): add automated Lighthouse audit pipeline

Dockerfile

@@ -1,7 +1,8 @@
+ARG NODE_VERSION
 ARG CADDY_VERSION
 
 # --- BUILD ---
-FROM node:24-alpine AS build
+FROM node:${NODE_VERSION}-alpine AS build
 RUN corepack enable && corepack prepare pnpm@latest --activate
 
 ENV ASTRO_TELEMETRY_DISABLED=1
@@ -10,10 +11,19 @@ WORKDIR /app
 
 # Copy depedencies
 COPY package.json pnpm-lock.yaml ./
-RUN pnpm install --frozen-lockfile
 
-# Copy all and build
+# Install pnpm with cache
+RUN --mount=type=cache,id=pnpm,target=/pnpm/store \
+    PNPM_HOME="/pnpm" pnpm install --frozen-lockfile
+
+# Copy all
 COPY . .
+
+# Check files
+RUN pnpm run lint
+RUN pnpm run check
+
+# Build
 RUN pnpm build
 
 # --- DEPLOY ---