docs: separate documentation from README.md

docs/build-configuration.md

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+# Build Configurations
+
+Once the module installation is complete, you can simply build the platform package with the command below.
+
+```shell
+# For Windows (.exe, .appx)
+$ npm run build:win
+
+# For macOS (.dmg)
+$ npm run build:mac
+
+# For Linux (.rpm, .deb, .snap)
+$ npm run build:linux
+```
+
+The built packages can be found in `dist/release/{version}` location.
+
+### Build settings for projects that use Native Node modules
+
+For projects that use the **Native Node Module**, add the following script to your package.json: When installing dependencies, electron-builder will take care of any modules that require rebuilding.
+
+```json
+{
+  "scripts": {
+    "postinstall": "electron-builder install-app-deps"
+  }
+}
+```
+
+For more information, please refer to the following article: https://webpack.electron.build/dependency-management#installing-native-node-modules
+
+### What do I need to do for a multi-platform build?
+
+**macOS** is recommended if you want to build multiple platforms simultaneously on one platform. Because it can be configured with just a few very simple settings.
+
+You can perform multi-platform builds at once with the following command. Alternatively, you can just do it for the OS you want via the individual build commands above.
+
+```shell
+$ npm run build
+```
+
+`Multipass` configuration may be required for Linux builds. Learn more about `Multipass` through the following link: https://multipass.run