📝 Improve README on npm

Author: lambdalisue

README.md

@@ -136,24 +136,6 @@ const a: unknown = "Hello";
 const _: string = maybe(a, is.String) ?? "default value";
 ```
 
-## Node.js (npm)
-
-To use `unknownutil` in [Node.js][nodejs], install `unknownutil` like
-
-```console
-npm i unknownutil
-```
-
-Then import `is`, `assert`, `ensure`, and `maybe` like:
-
-```typescript, ignore
-import { assert, ensure, is, maybe } from "unknownutil";
-
-// ...
-```
-
-[nodejs]: https://nodejs.org/
-
 ## Migration
 
 See [GitHub Wiki](https://github.com/lambdalisue/deno-unknownutil/wiki) for

scripts/build_npm.ts

@@ -35,4 +35,15 @@ await build({
 
 // post build steps
 Deno.copyFileSync("LICENSE", "npm/LICENSE");
-Deno.copyFileSync("README.md", "npm/README.md");
+
+// build README for npm
+let readme = Deno.readTextFileSync("README.md");
+readme = readme.replaceAll(
+  "https://deno.land/x/unknownutil@$MODULE_VERSION/mod.ts",
+  name,
+);
+readme = readme.replaceAll(
+  "## Usage",
+  `## Install\n\nInstall via npm:\n\n\`\`\`sh\nnpm install --save ${name}\n\`\`\`\n\n## Usage`,
+);
+Deno.writeTextFileSync("npm/README.md", readme);