chore: add pnpm workspace configuration for apps and packages

.devcontainer/devcontainer.json

@@ -0,0 +1,52 @@
+{
+  "name": "DreamChat Development",
+  "dockerComposeFile": "docker-compose.yml",
+  "service": "app",
+  "workspaceFolder": "/workspace",
+  "features": {
+    "ghcr.io/devcontainers/features/node:1": {
+      "version": "24"
+    },
+    "ghcr.io/devcontainers/features/docker-in-docker:2": {
+      "moby": false
+    }
+  },
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "dbaeumer.vscode-eslint",
+        "esbenp.prettier-vscode",
+        "bradlc.vscode-tailwindcss",
+        "ms-vscode.vscode-typescript-next",
+        "nestjs.vscode-nestjs",
+        "prisma.prisma"
+      ],
+      "settings": {
+        "editor.formatOnSave": true,
+        "editor.defaultFormatter": "esbenp.prettier-vscode",
+        "typescript.preferences.importModuleSpecifier": "relative"
+      }
+    }
+  },
+  "forwardPorts": [3000, 5173, 5432],
+  "portsAttributes": {
+    "3000": {
+      "label": "Backend API",
+      "onAutoForward": "notify"
+    },
+    "5173": {
+      "label": "Frontend Dev Server",
+      "onAutoForward": "notify"
+    },
+    "5432": {
+      "label": "PostgreSQL",
+      "onAutoForward": "silent"
+    }
+  },
+  "postCreateCommand": "bash .devcontainer/post-create.sh",
+  "remoteUser": "node",
+  "mounts": [
+    "source=${localWorkspaceFolderBasename}-node_modules,target=${containerWorkspaceFolder}/node_modules,type=volume",
+    "source=${localWorkspaceFolderBasename}-pnpm-store,target=/home/node/.local/share/pnpm/store,type=volume"
+  ]
+}