diff --git a/Dockerfile b/Dockerfile
index 337d6e44..9750c92a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,26 +1,22 @@
-# ---------- build stage ----------
-FROM node:20-alpine AS builder
+# Base image with Corepack → pnpm already included
+FROM node:20-alpine
 
-# pnpm is the package manager used by Strudel
-RUN corepack enable && npm install -g pnpm  # corepack ships with Node 20 :contentReference[oaicite:0]{index=0}
+# Build-time tools needed by some native deps
+RUN apk add --no-cache git python3 make g++ \
+    && corepack enable \
+    && corepack prepare pnpm@latest --activate   # pin if you prefer
 
-# native deps needed for sharp and other Astro plugins to compile on Alpine Linux :contentReference[oaicite:1]{index=1}
-RUN apk add --no-cache git python3 make g++
-
-WORKDIR /app
+WORKDIR /usr/src/app
 COPY . .
 
-# deterministic install & build
-RUN pnpm install --frozen-lockfile  # workspace root uses pnpm :contentReference[oaicite:2]{index=2}
-RUN pnpm build                     # produces website/dist (Astro default) :contentReference[oaicite:3]{index=3}
+# 1. install monorepo deps
+RUN pnpm install --frozen-lockfile
 
-# ---------- runtime stage ----------
-FROM nginx:alpine
-LABEL org.opencontainers.image.source="https://github.com/tidalcycles/strudel"
+# 2. generate docs once – JsDoc.jsx expects this file
+RUN pnpm run jsdoc-json      # produces ./doc.json :contentReference[oaicite:0]{index=0}
 
-# copy the static site produced above
-COPY --from=builder /app/website/dist /usr/share/nginx/html
+# Expose Astro’s default dev port
+EXPOSE 4321    # default per Astro docs :contentReference[oaicite:1]{index=1}
 
-EXPOSE 80
-HEALTHCHECK CMD wget -qO- http://localhost/ || exit 1
-CMD ["nginx","-g","daemon off;"]
+# 3. launch the dev server, listen on all interfaces
+CMD ["pnpm", "dev", "--", "--host", "0.0.0.0", "--port", "4321"]