Add warning about Windows line-endings issues to docs

doc/SETUP_DEVELOPMENT.md

@@ -29,6 +29,11 @@ If instead you just want to run Foodsoft without changing its code, please refer
    unfinished parts. If you want to be safe, choose the last release:
    `git checkout $(git tag -l | grep ^v | sort -rn | head -n1)`
 
+   *Note:* When developing on Windows you might run into issues with shell scripts
+   because of Git auto-crlf. Have a look how to avoid that in the
+   [Docker Development Setup](./SETUP_DEVELOPMENT_DOCKER.md#prerequisites-windows-only)
+   instructions.
+
 1. Install RVM and Ruby 2.4+ (if you have not done so before):
 
         \curl -L https://get.rvm.io | bash
@@ -182,3 +187,4 @@ within a docker image. While the default [`Dockerfile`](../Dockerfile) is setup
 use docker-compose (using [`docker-compose-dev.yml`](../docker-compose-dev.yml)) to
 setup the whole stack at once.
 
+See [Setup Development Docker](./SETUP_DEVELOPMENT_DOCKER.md) for a detailed description.

doc/SETUP_DEVELOPMENT_DOCKER.md

@@ -17,6 +17,15 @@ For installing instructions see https://docs.docker.com/installation/.
 Docker runs on every modern Linux kernel, but also with a little help on MacOS
 and Windows!
 
+## Prerequisites (Windows only)
+To avoid line-ending issues with shell scripts, make sure to configure
+Git autocrlf to keep linux line endings via
+
+    git config --local core.autocrlf input
+
+Don't forget to do a clean checkout (delete everything except `.git` directory)
+afterwards.
+
 ## Setup
 
 Then setup foodsoft development (this will take some time, containers needs