chore: add pnpm workspace configuration for apps and packages

.devcontainer/Dockerfile

@@ -0,0 +1,20 @@
+FROM mcr.microsoft.com/devcontainers/typescript-node:24
+
+# Install additional tools
+RUN apt-get update && apt-get install -y \
+    postgresql-client \
+    redis-tools \
+    && rm -rf /var/lib/apt/lists/*
+
+# Set up pnpm environment
+ENV PNPM_HOME=/home/node/.local/share/pnpm
+ENV PATH=$PNPM_HOME:$PATH
+
+USER node
+
+# Set working directory
+WORKDIR /workspace
+
+# Install global packages
+RUN pnpm install -g @nestjs/cli@latest
+