enable import of interval-bins binEvenLengthRound in package vcf-geno…

…type-brapi

 ... as binEvenLengthRound was undefined in production container build.
package.json : move rollup configuration from prepare script to rollup.config.js. update version -> 1.0.2
added rollup.config.js, based on copy from child-process-progressive/
drop webpack.config.js as it has been replaced by rollup.config.js

package.json

@@ -1,25 +1,29 @@
 {
   "name": "interval-bins",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/plantinformatics/interval-bins.git"
   },
   "description": "binEvenLengthRound() : Calculate the bin size for even-sized bins to span the given interval. binBoundaries() : Generate an array of even-sized bins to span the given interval.",
-  "main": "src/index.js",
+  "type": "module",
+  "main": "main.js",
   "browser": "dist/interval-bins.js",
   "exports": {
-    "import": "./dist/interval-bins.js",
-    "require": "./src/index.js"
+    ".": {
+      "import": "./dist/interval-bins.mjs",
+      "require": "./dist/interval-bins.cjs"
+    },
+    "./dist/interval-bins.mjs": "./dist/interval-bins.mjs",
+    "./dist/interval-bins.cjs": "./dist/interval-bins.cjs"
   },
   "files": [
     "dist",
     "src"
   ],
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
-    "prepare": "rm -rf build && mkdir build && rollup -f umd -n interval-bins -o dist/interval-bins.js -- main.js",
-    "build": "webpack"
+    "prepare": "rm -rf dist && mkdir dist && rollup -c"
   },
   "keywords": [
     "javascript",

rollup.config.js

@@ -0,0 +1,26 @@
+import resolve from '@rollup/plugin-node-resolve';
+import commonjs from '@rollup/plugin-commonjs';
+import json from '@rollup/plugin-json';
+
+export default {
+  input: 'main.js',  // Entry point for the application
+  output: [
+  {
+    file: 'dist/interval-bins.mjs', // Output bundle location
+    format: 'esm'
+  },
+  {
+    file: 'dist/interval-bins.cjs', // Output bundle location
+    format: 'cjs' // CommonJS format suitable for Node.js require()
+  }
+  ],
+  plugins: [
+    resolve({
+      preferBuiltins: true // Prefer Node.js built-ins over npm modules if available
+    }),
+    commonjs(),
+    json()
+  ],
+  // List of Node built-in modules to leave as external dependencies
+  // external: []
+};