trim down the plugin server dockerfile a bit more

docker/Dockerfile.plugin

@@ -1,13 +1,7 @@
 FROM ghcr.io/posthog/rust-node-container:bullseye_rust_1.80.1-node_18.19.1 AS plugin-server-build
-WORKDIR /code
-COPY ./rust ./rust
-COPY ./plugin-transpiler/ ./plugin-transpiler/
 WORKDIR /code/plugin-server
 SHELL ["/bin/bash", "-e", "-o", "pipefail", "-c"]
 
-# Compile and install Node.js dependencies.
-COPY ./plugin-server/package.json ./plugin-server/pnpm-lock.yaml ./plugin-server/tsconfig.json ./
-COPY ./plugin-server/patches/ ./patches/
 RUN apt-get update && \
   apt-get install -y --no-install-recommends \
   "make" \
@@ -17,11 +11,4 @@ RUN apt-get update && \
   "libssl-dev" \
   "zlib1g-dev" \
   && \
-  rm -rf /var/lib/apt/lists/* && \
-  corepack enable && \
-  mkdir /tmp/pnpm-store && \
-  pnpm install --frozen-lockfile --store-dir /tmp/pnpm-store && \
-  cd ../plugin-transpiler && \
-  pnpm install --frozen-lockfile --store-dir /tmp/pnpm-store && \
-  pnpm build && \
-  rm -rf /tmp/pnpm-store
+  rm -rf /var/lib/apt/lists/*