Create tutorial.md

docs/tutorial.md

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+# Kemal Tutorial
+
+## Install Crystal
+
+```
+brew update
+brew install crystal-lang
+```
+
+## Installing Kemal
+
+You should create your application first:
+
+```
+crystal init app awesome_web_project
+cd awesome_web_project
+```
+
+Then add *kemal* to the `shard.yml` file as a dependency.
+
+```
+dependencies:
+  kemal:
+    github: sdogruyol/kemal
+    branch: master
+```
+
+You should run `shards` to get dependencies:
+
+```
+shards install
+```
+
+## Include Kemal into your project
+
+Open `awesome_web_project/src/awesome_web_project.cr` and require `kemal` to use Kemal.
+
+```
+require 'kemal'
+```
+
+## Hack your project
+
+Do some awesome stuff with awesome Kemal.
+
+```
+get "/" do
+  "Hello World!"
+end
+```
+
+## Run your awesome web project.
+
+```
+crystal build --release src/awesome_web_project.cr
+./awesome_web_project
+```
+
+Now you can be happy with your new, very fast, readable web project.