big readme update with full examples, description, and contrib guides

README.md

@@ -2,6 +2,8 @@
 
 [![API Documentation Website](https://img.shields.io/website?down_color=red&down_message=Offline&label=API%20Documentation&up_message=Online&url=https%3A%2F%2Fluckyframework.github.io%2Favram%2F)](https://luckyframework.github.io/avram)
 
+Database ORM built for the [Lucky Framework](https://luckyframework.org/) written in Crystal. Supporting PostgreSQL 12+ and based off principals of [Elixir Ecto](https://hexdocs.pm/ecto/Ecto.html) and [Rails ActiveRecord](https://guides.rubyonrails.org/active_record_basics.html).
+
 ### Why Avram?
 
 The name comes from [Henriette Avram](https://en.wikipedia.org/wiki/Henriette_Avram).
@@ -22,34 +24,73 @@ dependencies:
 
 ```crystal
 require "avram"
+
+# Define your database
+class AppDatabase < Avram::Database
+end
+
+AppDatabase.configure do |settings|
+  settings.credentials = Avram::Credentials.new(
+    database: "my_app_development",
+    username: "postgres",
+    hostname: "localhost",
+    password: "password",
+    port: 5432,
+  )
+end
+
+# Configure Avram to use your database
+Avram.configure do |settings|
+  settings.database_to_migrate = AppDatabase
+
+  # When `true`, allow lazy loading (N+1).
+  # If `false` raise an error if you forget to preload associations
+  settings.lazy_load_enabled = true
+  settings.query_cache_enabled = false
+end
+
+# Create your read-only model
+class Person < Avram::Model
+  def self.database : Avram::Database.class
+    AppDatabase
+  end
+
+  table :people do
+    column name : String
+    column age : Int32
+    column programmer : Bool = true
+  end
+end
+
+# Insert a new record
+Person::SaveOperation.create!(name: "Henriette Davidson Avram", age: 86)
+# Query for a record
+person = Person::BaseQuery.new.name.ilike("%avram")
+person.programmer? #=> true
 ```
 
+For more details, read the [guides](https://luckyframework.org/guides/database/intro-to-avram-and-orms).
+
 ## Contributing
 
 1. Fork it ( https://github.com/luckyframework/avram/fork )
 1. Create your feature branch (git checkout -b my-new-feature)
-1. Install docker and docker-compose: https://docs.docker.com/compose/install/
-1. Run `script/setup`
 1. Make your changes
-1. Run `script/test` to run the specs, build shards, and check formatting
+1. Run specs `crystal spec`
+1. Check formatting `crystal tool format spec/ src/`
+1. Check ameba `./bin/ameba`
 1. Commit your changes (git commit -am 'Add some feature')
 1. Push to the branch (git push origin my-new-feature)
 1. Create a new Pull Request
 
-## Testing
-
-To run the tests:
+> Docker is provided for quick setup and testing. You can run `./script/setup` and `./script/test` for ease.
 
-1. Install docker and docker-compose: https://docs.docker.com/compose/install/
-1. Run `script/setup` to set up the docker environment
-1. Run `script/test` to run the specs, build shards, and check formatting
-
-You can run individual tests like this: `docker-compose run --rm app crystal spec path/to/spec.cr`
+## Contributors
 
-> Remember to run `docker-compose down` when you're done. This will stop the
-> Crystal container.
+[paulcsmith](https://github.com/paulcsmith) Paul Smith - Original Creator of Lucky
 
-## Contributors
+<a href="https://github.com/luckyframework/avram/graphs/contributors">
+  <img src="https://contrib.rocks/image?repo=luckyframework/avram" />
+</a>
 
-- [paulcsmith](https://github.com/paulcsmith) Paul Smith - creator, maintainer
-- [mikeeus](https://github.com/mikeeus) Mikias Abera - contributor
+Made with [contrib.rocks](https://contrib.rocks).