add architecture specific builds

Author: stephenegriffin

docs/Building.md

@@ -49,10 +49,26 @@ Alternatively, you can build using Node.js and node-gyp (this creates a static l
 
 3. **Build**:
 
+   **Default build (matches your Node.js architecture):**
+
    ```bash
    npm run build
    ```
 
+   **Architecture-specific builds:**
+
+   ```bash
+   npm run build:x64    # 64-bit library
+   npm run build:x86    # 32-bit library  
+   npm run build:arm64  # ARM64 library
+   ```
+
+   **Clean build artifacts:**
+
+   ```bash
+   npm run clean
+   ```
+
 The output will be `MAPIStubLibrary.lib` in the `build/Release` directory.
 
 ## Build Output

package.json

@@ -4,7 +4,11 @@
   "description": "MAPI Stub Library for 32 and 64 bit applications",
   "scripts": {
     "build": "node-gyp rebuild",
-    "clean": "node-gyp clean"
+    "build:x64": "node-gyp rebuild --arch=x64",
+    "build:x86": "node-gyp rebuild --arch=ia32",
+    "build:arm64": "node-gyp rebuild --arch=arm64",
+    "clean": "node-gyp clean",
+    "clean:all": "node-gyp clean && rmdir /s /q build 2>nul || true"
   },
   "devDependencies": {
     "clang-format": "^1.8.0"