Add description for native setup on macOS

LOCAL_SETUP.md

@@ -64,3 +64,97 @@ rails s -p 3000 -b 0.0.0.0
 ### Login to CodeOcean
 192.168.59.104:3000  
 admin@example.org:admin
+
+## Native setup (for macOS)
+
+- Clone this repository:
+  ```shell script
+  git clone git@github.com:openHPI/codeocean.git
+  ```
+- Install PostgreSQL, start it and create a generic postgres user:
+  ```shell script
+  brew install postgresql
+  brew services start postgresql
+  createuser -s -r postgres
+  ```
+- Install [NVM](https://github.com/creationix/nvm) and node:
+  ```shell script
+  brew install nvm
+  mkdir ~/.nvm
+  nvm install --lts
+  ```
+- Add the following lines to your profile. (e.g., `~/.zshrc`):
+  ```shell script
+  # NVM
+  export NVM_DIR=~/.nvm
+  source $(brew --prefix nvm)/nvm.sh
+  ```
+- Install yarn:
+  ```shell script
+  brew install yarn --ignore-dependencies
+  ```
+- Install docker:
+  ```shell script
+  brew install docker
+  open /Applications/Docker.app/
+  ```
+- Install nginx and adopt its config to forward requests to the **RAW** docker UNIX socket (see [this issue](https://github.com/docker/for-mac/issues/1662) for more details):
+  ```shell script
+  brew install nginx
+  ```
+  Edit `/usr/local/etc/nginx/nginx.conf`:
+  1. Change the default port `8080` to `2376` (around line 36).
+  2. Replace the `location /` with the following and (!) replace `<yourname>` with the output of `whoami`:
+  ```editorconfig
+  location / {
+    proxy_set_header X-Real-IP $remote_addr;
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto $scheme;
+    proxy_set_header Host $host;
+    proxy_set_header X-NginX-Proxy true;
+  
+    proxy_pass http://unix:/Usrers/<yourname>/Library/Containers/com.docker.docker/Data/docker.raw.sock;
+    proxy_redirect off;
+  
+    proxy_http_version 1.1;
+    proxy_set_header Upgrade $http_upgrade;
+    proxy_set_header Connection "upgrade";
+  }
+  ```
+  Now, start nginx:
+  ```shell script
+  brew services start nginx
+  ```
+- Install RVM and bundler:
+  ```shell script
+  gpg2 --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
+  curl -sSL https://get.rvm.io | bash -s stable --rails
+  gem install bundler
+  ```
+- Install geckodriver and Firefox for Selenium:
+  ```shell script
+  brew install geckodriver
+  brew cask install firefox
+  ```
+- Get a local copy of the config files:
+  ```shell script
+  for f in action_mailer.yml database.yml secrets.yml sendmail.yml smtp.yml code_ocean.yml docker.yml.erb mnemosyne.yml
+  do
+    if [ ! -f config/$f ]
+    then
+      cp config/$f.example config/$f
+    fi
+  done
+  ```
+- Install gems and yarn files:
+  ```shell script
+  bundle install
+  yarn install
+  ```
+- Setup your database:
+  ```shell script
+  rake db:create
+  rake db:schema:load
+  rake db:migrate
+  rake db:seed
+  ```