docs: update README.md and project configuration for Yarn workspaces

Author: kaiz-io

typescript/postgres-lambda/.gitignore

@@ -2,7 +2,7 @@
 !jest.config.js
 *.d.ts
 node_modules
-**/node_modules
+#**/node_modules
 
 !lambda/*/*.js
 

typescript/postgres-lambda/README.md

@@ -144,6 +144,7 @@ SELECT validate_data('{"id": 789, "value": "valid data"}'::JSONB);
 ├── test/                   # Unit tests
 ├── setup-postgres-lambda.sql # Reference SQL (now automated)
 ├── test-lambda.sh         # Lambda testing script
+├── .yarn/                 # Yarn 2+ configuration
 └── README.md              # This file
 ```
 
@@ -155,11 +156,11 @@ This project uses Yarn Workspaces to manage multiple packages in a monorepo stru
 # List all workspaces
 yarn workspaces list
 
-# Run a command in all Lambda workspaces
-yarn workspaces foreach -v --include '@lambda/*' run <command>
+# Run a command in all workspaces
+yarn workspaces foreach -v -A run <command>
 
 # Run a command in a specific workspace
-yarn workspace @lambda/lambda-to-postgres run <command>
+yarn workspace postgres-to-lambda run <command>
 
 # Install dependencies for all workspaces
 yarn install
@@ -240,6 +241,12 @@ Before using in production:
 ### Useful Commands
 
 ```bash
+# Build all packages
+yarn build
+
+# Build only Lambda functions
+yarn build:lambda
+
 # Build and watch for changes
 yarn watch
 

typescript/postgres-lambda/package.json

@@ -12,7 +12,8 @@
     "build:lambda": "yarn workspaces foreach -v -A run build",
     "watch": "tsc -w",
     "test": "jest",
-    "cdk": "cdk"
+    "cdk": "cdk",
+    "install-deps": "cd lambda/lambda-to-postgres && npm install --prefix ./deps && cd ../../lambda/postgres-to-lambda && npm install --prefix ./deps && cd ../../lambda/postgres-setup && npm install --prefix ./deps"
   },
   "devDependencies": {
     "@types/jest": "^29.5.14",
@@ -28,5 +29,6 @@
     "aws-cdk-lib": "^2.204.0",
     "constructs": "^10.4.2",
     "esbuild": "^0.25.6"
-  }
+  },
+  "packageManager": "[email protected]"
 }