message: improving readme. Fixes:
diff: @@ -30,7 +30,7 @@ Live Demo @ heroku: https://pigallery2.herokuapp.com/
  ## 1. Getting started (also works on Raspberry Pi)
  -### 1.1 Install and Run with Docker (recommended)
  +### 1.1 [Install and Run with Docker (recommended)](docker/README.md)
  [Docker](https://www.docker.com/) with [docker-compose](https://docs.docker.com/compose/) is the official and recommend way of installing and running *Pigallery2*.
  It contains all necessary dependencies, auto restarts on reboot, supports https, easy to upgrade to newer versions.
  @@ -89,6 +89,9 @@ Default user: `admin` pass: `admin`
  Running `npm start -- --Server-port=8080` will start the app on port 8080 that does not require `root`
  Adding read/write permissions to all files can solve the file access issue `chmod -R o-w .`, see [#98](https://github.com/bpatrik/pigallery2/issues/98).
  +##### 1.2.2.1 Run on startup
  +You can run the app up as a service to run it on startup. Read more at [#42](https://github.com/bpatrik/pigallery2/issues/42#issuecomment-458340945)
  +
  ### 1.3 Advanced configuration
  You can set up the app the following ways:
  * Using the UI
  