Jump through pnpm hoops

Dockerfile

@@ -1,7 +1,14 @@
 FROM node:lts as base
+
+
+FROM node:20-slim AS base
+ENV PNPM_HOME="/pnpm"
+ENV PATH="$PNPM_HOME:$PATH"
+RUN corepack enable
+
 WORKDIR /base
 COPY package.json pnpm-lock.yaml ./
-RUN pnpm install --frozen-lockfile
+RUN --mount=type=cache,id=pnpm,target=/pnpm/store pnpm install --prod --frozen-lockfile
 COPY . .
 
 FROM base AS dev