more tutorial

examples/tutorial/hello/ruby/.gitignore

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+bundle/
+.bundle/
+func.yaml
+Dockerfile
+Gemfile.lock

examples/tutorial/hello/ruby/Gemfile

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+source 'https://rubygems.org'
+
+gem 'httparty', '~> 0.14.0'
+gem 'json', '> 1.8.2'

examples/tutorial/hello/ruby/README.md

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+## Quick Example for a Ruby Function (4 minutes)
+
+This example will show you how to test and deploy a Ruby function to Oracle Functions.
+
+```sh
+# create your func.yaml file
+fn init <YOUR_DOCKERHUB_USERNAME>/hello
+# install dependencies, we need the json gem to run this
+docker run --rm -it -v ${pwd}:/worker -w /worker funcy/ruby:dev bundle install --standalone --clean
+# build the function
+fn build
+# test it
+cat hello.payload.json | fn run
+# push it to Docker Hub
+fn push
+# Create a route to this function on Oracle Functions
+fn routes create myapp /hello
+```
+
+Now surf to: http://localhost:8080/r/myapp/hello
+
+## Dependencies
+
+Create a [Gemfile](http://bundler.io/gemfile.html) file in your function directory, then run:
+
+```sh
+docker run --rm -it -v ${pwd}:/worker -w /worker funcy/ruby:dev bundle install --standalone --clean
+```
+
+Ruby doesn't pick up the gems automatically, so you'll have to add this to the top of your `func.rb` file:
+
+```ruby
+require_relative 'bundle/bundler/setup'
+```
+
+Open `func.rb` to see it in action.
+
+To update dependencies:
+
+```sh
+docker run --rm -it -v ${pwd}:/worker -w /worker funcy/ruby:dev bundle update
+# then install again to vendor them
+docker run --rm -it -v ${pwd}:/worker -w /worker funcy/ruby:dev bundle update
+```

examples/tutorial/hello/ruby/func.rb

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+require_relative 'bundle/bundler/setup'
+require 'json'
+
+name = "World"
+
+payload = STDIN.read
+if payload != ""
+    payload = JSON.parse(payload)
+    name = payload['name']
+end
+
+puts "Hello #{name} from Ruby!"

examples/tutorial/hello/ruby/hello.payload.json

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+{
+    "name": "Johnny"
+}