Improve setup instructions and README

- README cleanups and link to documentation
- Improve dev setup instructions
- Fix js linting errors
- Move local setup instructions to installation docs
- Project link fix, closes #42
- Notes about frontend
- Clarify different LND backends

docs/devs/installation.md

@@ -5,30 +5,47 @@ title: Installation
 nav_order: 1
 ---
 
-
 Installation
 ============
 
-LNbits uses [Flask](http://flask.pocoo.org/).
-
+Download this repo and install the dependencies.
 
 Application dependencies
 ------------------------
 
 The application uses [Pipenv][pipenv] to manage Python packages.
-While in development, you will need to install all dependencies (includes packages like `black` and `flake8`):
+While in development, you will need to install all dependencies:
 
-    $ pipenv shell
-    $ pipenv install --dev
+```sh
+$ pipenv shell
+$ pipenv install --dev
+```
 
+You will need to set the variables in `.env.example`, and rename the file to `.env`.
+
+![Files](https://i.imgur.com/ri2zOe8.png)
+
+You might also need to install additional packages, depending on the [backend wallets](../guide/wallets.md) you configured.
+E.g. when you want to use LND you have to `pipenv install lnd-grpc`.
+
+Take a look at [Polar](https://lightningpolar.com/) for an excellent way of spinning up a Lightning Network dev environment.
 
 Running the server
 ------------------
 
-    $ flask run
+LNbits uses [Flask](http://flask.pocoo.org/) as an application server.
+
+```sh
+$ pipenv run flask migrate
+$ pipenv run flask run
+```
 
 There is an environment variable called `FLASK_ENV` that has to be set to `development`
 if you want to run Flask in debug mode with autoreload
 
+[pipenv]: https://pipenv.pypa.io/
 
-[pipenv]: https://docs.pipenv.org/#install-pipenv-today
+Frontend
+--------
+
+The views are build using [Vue.js and Quasar](https://quasar.dev/start/how-to-use-vue).