build: run prepare before install in Dockerfile

Dockerfile

@@ -37,6 +37,10 @@ FROM base AS mud
 COPY . /app
 WORKDIR /app
 
+# pnpm no longer runs prepare before the actual install (https://github.com/pnpm/pnpm/issues/3760)
+# but we need to create some placeholder files like bins so that the install step can find them and put references to them in the right spot
+# this resolves some chicken-and-egg problems with using workspace bins before they're created (install -> build -> install)
+RUN pnpm recursive run prepare
 RUN --mount=type=cache,id=pnpm,target=/pnpm/store pnpm install --frozen-lockfile
 RUN pnpm run -r build