Init commit

Author: 7nik

.gitignore

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+/node_modules/
+/build/
+
+.DS_Store

README.md

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+# Get started
+
+Install the dependencies...
+
+```bash
+cd test-svelte-userscript
+npm install
+```
+
+...then start [Rollup](https://rollupjs.org):
+
+```bash
+npm run dev
+```
+
+Install a script manager, e.g. [Tampermonkey](https://www.tampermonkey.net/), open it, create a new usercript and copy content of build/calculator.user.js file, and save it.
+
+Navitage to [Google home page](https://www.google.com/) and enjoy the calculator.
+
+# Building and running in production mode
+
+To create an optimised version of the app:
+
+```bash
+npm run build
+```