[#322] Add home, contribution guide, and testing section to github wiki

.template/addons/github/.github/wiki/Contribution_Guide.md

@@ -0,0 +1,117 @@
+## How to contribute
+
+### Template structure
+
+```
+.
+├── .template
+│   ├── addons
+│   │   └── docker
+│   │       ├── ...
+│   │       └── template.rb
+│   └── variants
+│       ├── api
+│       │   ├── ...
+│       │   └── template.rb
+│       └── web
+│           ├── ...
+│           └── template.rb
+├── app
+├── bin
+├── config
+├── spec
+├── ...
+├── README.md
+├── README.md.tt
+└── template.rb
+```
+
+We keep the Rails-app-like structure. On the root, there are base project file templates.
+Other files including the template options are in `.template` folder.
+
+There are 2 kinds of the template options:
+
+1. **Variants** - For the app main options, which are `web` and `api`.
+
+2. **Addons** - For other extra options that we can add to the project like `docker` or `bootstrap`,
+use the prompt `ask` to generate a question before generating the project.
+
+### Template files
+
+There are 2 template file types:
+
+1. **`.tt` files**
+
+    This file is used for templating the whole new file.
+    In case if we want to create a new file that Rails has not generated.
+
+2. **`.rb` files**
+
+    This is used for modifying the files that Rails has generated.
+    The file name should be the same as on the generated app.
+    If it is not a ruby file, append the `.rb` as an extension e.g. `Gemfile.rb`
+
+### Template specs
+
+We are using [Serverspec](https://serverspec.org/) to test the template.
+For any changes made, you **must** add a spec for it.
+
+Test files are located under `.template/spec` folder
+
+```
+.
+├── ...
+├── .template
+│   ├── ...
+│   ├── spec
+│   │   └── addons
+│   │   │   └── base
+│   │   │   │   └── docker
+│   │   │   │   │   ├── ...
+│   │   │   │   │   └── template_spec.rb
+│   │   │   │   └── semaphore
+│   │   │   │   │   ├── ...
+│   │   │   │   │   └── template_spec.rb
+│   │   │   └── variants
+│   │   │   │   └── web
+│   │   │   │   │   └── boostrap
+│   │   │   │   │       ├── ...
+│   │   │   │   │       └── template_spec.rb
+│   │   │   │   └── api
+│   │   │   │   │   └── addon
+│   │   │   │   │       ├── ...
+│   │   │   │   │       └── template_spec.rb
+│   │   └── base
+│   │   │   ├── ...
+│   │   │   └── template_spec.rb
+│   │   └── variants
+│   │   │   └── web
+│   │   │   │   ├── ...
+│   │   │   │   └── template_spec.rb
+│   │   │   └── api
+│   │   │   │   ├── ...
+│   │   │   │   └── template_spec.rb
+```
+
+### Template Strings
+
+When using template string with heredoc, use the proper name following the file type / content.
+
+This provides the meaningful context to the content and some IDEs also support to highlight the content depending on the type.
+
+- `DOCKERFILE`
+- `ERB`
+- `HTML`
+- `IGNORE` - For any ignore file e.g. `.gitignore`, `.eslintignore`
+- `JAVASCRIPT`
+- `JSON`
+- `PROCFILE`
+- `RUBY`
+- `SCSS`
+- `SHELL`
+
+For other files that are not fit the types above, use the extension as the name
+e.g. `TOOL_VERSION` for `.tool-version` file.
+
+For the normal string, name it after the content
+e.g. `ERROR` for template error message.

.template/addons/github/.github/wiki/Home.md

@@ -1 +1,65 @@
-> *Insert information about your project here!*
+<p align="center">
+  <img alt="Nimble logo" src="https://assets.nimblehq.co/logo/light/logo-light-text-320.png" />
+</p>
+
+<p align="center">
+  <strong>Rails Templates</strong>
+</p>
+
+
+---
+
+Our templates offer a rich boilerplate to jump start Rails-based application development and are based on our experience
+with building complex applications over the years.
+
+## Get Started
+
+### Requirements
+
+- Install ruby and set your local ruby version to `3.0.1`
+- Install rails `7.0.1`
+- Install node `16.13.2` (For creating web application)
+
+> 📝 If running on Apple M1, to build docker image, please make sure to set platform to AMD64 by `export DOCKER_DEFAULT_PLATFORM=linux/amd64`
+
+### Use the template
+
+In order to use the template, initialize a new app with the following parameters:
+
+```sh
+rails new <app_name> -m https://raw.githubusercontent.com/nimblehq/rails-templates/main/template.rb
+```
+
+Supported template options:
+- `--api` - create an api-only application
+
+To apply the template on an existing application, run following rails command:
+
+```sh
+rails app:template LOCATION=https://raw.githubusercontent.com/nimblehq/rails-templates/main/template.rb
+
+# To apply on an api application
+rails app:template LOCATION=https://raw.githubusercontent.com/nimblehq/rails-templates/main/template.rb API=true
+
+
+
+# To apply a specific addon
+rails app:template LOCATION=https://raw.githubusercontent.com/nimblehq/rails-templates/main/template.rb ADDON=<addon name>
+```
+
+Available Addons:
+- `docker`
+- `nginx`
+- `phrase`
+- `semaphore`
+- `bootstrap`
+- `slim`
+- `devise`
+
+After the template finishes generating all the files, run the following command to start the rails server.
+
+```sh
+make dev
+```
+
+Read more about Rails Application Template in the [official Rails Guides](https://guides.rubyonrails.org/rails_application_templates.html).

.template/addons/github/.github/wiki/Testing.md

@@ -0,0 +1,19 @@
+## Testing the Template
+
+To run [RuboCop](https://github.com/rubocop/rubocop) against the template:
+
+
+```sh
+.template/bin/rubocop
+
+
+bla bla bla
+```
+
+Any RuboCop command options can be passed:
+
+
+```sh
+# Run Ru`boCop with auto correct
+.template/bin/rubocop -a
+```

.template/addons/github/.github/wiki/_Sidebar.md

@@ -1,15 +1,7 @@
 ## Table of Contents
 
 - [[Home]]
-- [[Getting Started]]
-
-## Architecture
-
-- [[Authentication]]
-
-## Infrastructure
-
-- [[CI/CD|CI CD]]
+- [[Contribution_Guide]]
 
 ## Operations