diff --git a/Dockerfile.fast b/Dockerfile.fast
index a144829..e963b72 100644
--- a/Dockerfile.fast
+++ b/Dockerfile.fast
@@ -4,14 +4,14 @@
 FROM node:20-bookworm-slim AS frontend-builder
 WORKDIR /app/frontend
 
-ENV NODE_ENV=production
+ENV NODE_ENV=development
 RUN npm config set registry https://registry.npmjs.org/ \
  && npm config set fetch-timeout 300000 \
  && npm config set fetch-retry-mintimeout 20000 \
  && npm config set fetch-retry-maxtimeout 120000
 
 COPY frontend/package*.json ./
-RUN --mount=type=cache,target=/root/.npm npm install --no-audit --no-fund
+RUN --mount=type=cache,target=/root/.npm npm ci --no-audit --no-fund
 
 COPY frontend/src/ ./src/
 COPY frontend/public/ ./public/
@@ -21,7 +21,7 @@ COPY frontend/eslint.config.js ./
 
 ENV ROLLUP_SKIP_NODEJS_NATIVE=1
 ENV ROLLUP_NO_NATIVE=1
-RUN npx vite build
+RUN npm run build
 
 # Stage 2: Install backend deps on glibc
 FROM node:20-bookworm-slim AS backend-builder