fix: update dockerfile with env variable for node linker

Dockerfile

@@ -3,6 +3,8 @@ FROM node:20-alpine AS builder
 WORKDIR /app
 # Enable Corepack so we can use Yarn v4
 RUN corepack enable && corepack prepare yarn@stable --activate
+# Force Yarn to use node_modules instead of PnP
+ENV YARN_NODE_LINKER=node-modules
 COPY package.json yarn.lock ./
 RUN yarn install --immutable
 COPY . .