Create environment setup guide for MacOS (#73)

* Create environment setup guide for MacOS

* Fix indentations

---------

Co-authored-by: Andree Uuetoa <andree.uuetoa@gmail.com>

README.md

@@ -10,15 +10,17 @@ Materials are on `Google Drive > Lapikud > Tarkvara > Väliveeb`
 
 ## 1. Create Issues
 
-Easiest way to help would be to create issuses about things that are missing and wrong
+Easiest way to help would be to create issues about things that are missing and wrong
 
 ## 2. Fork this repo and create a pull request
 
 Fork this repo to your own account and create a pull request for changes you have done in there
 
-# How to setup devenvironment
+# How to setup development environment
 
-0. (Windows) Install the Windows Subsystem for Linux
+Windows:
+
+0. Install the Windows Subsystem for Linux
 
     Install Ubuntu
 
@@ -45,11 +47,57 @@ Fork this repo to your own account and create a pull request for changes you hav
 
     No one wants to download 5MB images that are then shown in a 100x100px box.
 
-    **Always resize images before commiting them!**
+    **Always resize images before committing them!**
 
         sudo apt-get install imagemagick
         sh convert-past-management-images.sh
 
+MacOS:
+
+0. Install Homebrew if you don't have it already
+
+    If you're using Bash, write `/bin/bash` instead of `/bin/zsh`.
+
+        /bin/zsh -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
+
+1. Install the latest stable version of Ruby
+
+        brew install ruby
+
+    Also configure your shell environment.
+    If you're using Bash, replace `.zshrc` with `.bash_profile`.
+    
+        if [ -d "/usr/local/opt/ruby/bin" ]; then
+        export PATH=/usr/local/opt/ruby/bin:$PATH
+        export PATH=`gem environment gemdir`/bin:$PATH
+        fi
+
+    Check that Ruby is working.
+
+        ruby -v
+
+2. Install the latest Jekyll gem
+
+        sudo gem install jekyll
+
+3. Clone repo
+
+        git clone https://github.com/Lapikud/lapikud.github.io.git
+
+4. Serve the page
+
+        cd lapikud.github.io
+        jekyll serve --host 0.0.0.0
+
+5. Image converter usage (requires imagemagick)
+
+    No one wants to download 5MB images that are then shown in a 100x100px box.
+    
+    **Always resize images before committing them!**
+    
+        sudo apt-get install imagemagick
+        sh convert-past-management-images.sh
+
 # Deploy
 
 Push to master branch and wait for deployment, it could take up to 2h for the page to update.