docs(contributing): add a programming language

CONTRIBUTING.md

@@ -6,7 +6,7 @@ Thanks a lot for your interest in contributing to **programming-challenges**!
 
 - [Submit a challenge](#submit-a-challenge)
 - [Submit a solution](#submit-a-solution)
-- Add support for a new language
+- [Add support for a new language](#add-a-language)
 - Correct spelling errors, improvements or additions to documentation files (README, CONTRIBUTING...).
 
 ## Submit a challenge
@@ -19,7 +19,7 @@ You can start editing the `test` folder of the challenge with corresponding `inp
 
 ## Submit a solution
 
-You can submit a new solution by running the command `programming-challenges generate challenge --challenge="<name>" --github-user="<your-github-user>" --language="<your-favorite-language>" --solution="<your-solution>"`.
+You can submit a new solution by running the command `programming-challenges generate solution --challenge="<name>" --github-user="<your-github-user>" --language="<your-favorite-language>" --solution="<your-solution>"`.
 
 After running this command, a new folder will be created inside the `solutions` folder of the challenge.
 
@@ -27,6 +27,17 @@ Start writing some code, inside the `solution` file with your favorite programmi
 
 Before submitting the solution, make sure it passes all the tests by running `programming-challenges run test --affected`.
 
+## Add a language
+
+You can add support for a new language, so you can solve the challenges with even more programming languages!
+
+- First create a new folder inside `templates/docker` with the file extension of the new programming language (e.g: `js`, `cpp`, etc.)
+- Inside this new folder create a `Dockerfile`, to compile and execute the solution
+- Create a new template inside `templates/solution` folder with the file extension of the new programming language, with the basic boilerplate to read from `stdin` and print to `stdout` the result
+- Run the command `programming-challenges generate solution --challenge="<name>" --github-user="<your-github-user>" --language="<your-new-language>" --solution="<your-solution>`
+
+Before submitting the new programming language, make sure it passes all the tests by running `programming-challenges run test --affected`
+
 ## Pull Requests
 
 - **Please first discuss** the change you wish to make via [issue](https://github.com/Divlo/programming-challenges/issues) before making a change. It might avoid a waste of your time.
@@ -60,3 +71,18 @@ Types define which kind of changes you made to the project.
 ### Scopes
 
 Scopes define what part of the code changed.
+
+- cli
+- challenges
+- solutions
+- languages
+
+### Examples
+
+```sh
+git commit -m "feat(languages): add C# support"
+git commit -m "fix(cli): improve --ci option to `run test` command"
+git commit -m "feat(challenges): add `hello-world`"
+git commit -m "feat(solutions): add `hello-world/javascript/function`"
+git commit -m "docs: fix typo `at` should be `on`"
+```