Add Prune The Excess From node_modules as a workflow til

workflow/prune-the-excess-from-node-modules.md

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+# Prune The Excess From node_modules
+
+The `node_modules` directory, which is part of every JavaScript project, is
+infamously heavy. It is a massive directory of all your project's dependencies
+and those dependencies' dependencies.
+
+The size of `node_modules` can become a problem on CI build servers with
+limited disk space. You can significantly reduce the size of `node_modules` by
+pruning away all the excess files that aren't needed during builds like
+markdown files, typescript source files, etc.
+
+Include the [`node-prune`](https://github.com/tj/node-prune) binary as part of
+your build pipeline to handle this.
+
+```bash
+$ node-prune /path/to/node_modules
+```
+
+In one instance, I saw a reduction from 400MB to 11MB in the `node_modules`
+directory size.