multi-stage build: vite frontend + node server

Dockerfile

@@ -1,17 +1,22 @@
+# ---- build the web frontend ----
 FROM node:20-alpine AS webbuild
-WORKDIR /app/web
+WORKDIR /build
 COPY web/package.json ./
 RUN npm install
-COPY web ./
+COPY web/ ./
 RUN npm run build
 
+# ---- server runtime ----
 FROM node:20-alpine
-RUN apk add --no-cache python3 make g++
 WORKDIR /app/server
+# build tools as a fallback if better-sqlite3 has no prebuilt binary
+RUN apk add --no-cache python3 make g++
 COPY server/package.json ./
 RUN npm install --omit=dev
-COPY server ./
-COPY --from=webbuild /app/web/dist /app/web/dist
-ENV NODE_ENV=production PORT=8080
+COPY server/ ./
+COPY --from=webbuild /build/dist /app/web/dist
+
+ENV NODE_ENV=production
+ENV PORT=8080
 EXPOSE 8080
 CMD ["node", "src/index.js"]