diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..dd13e1f
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,48 @@
+# Contributing
+
+## Quick Guide
+
+1. [Fork](https://help.github.com/articles/fork-a-repo/) this repository to your own GitHub account and then [clone](https://help.github.com/articles/cloning-a-repository/) it to your local machine.
+2. Install the dependencies (`composer install --dev`)
+3. Create a new branch (`git checkout -b feat/new-feature`)
+4. Write your feature or fix and make sure tests pass and code standards are met (see below)
+5. Commit your changes (`git commit -m 'feat(new-feature): some feature or fix'`)
+6. Push to the branch (`git push origin feat/new-feature`)
+7. Open a pull request
+
+## Working with Docker 🐳
+
+This project provides a Docker setup that allows working on it using any of the supported PHP versions.
+
+To use it, you first need to install:
+
+* [Docker](https://docs.docker.com/get-docker/)
+* [Docker Compose](https://docs.docker.com/compose/install/)
+
+Make sure the versions installed support [Compose file format 3.9](https://docs.docker.com/compose/compose-file/).
+
+You can then build the images:
+
+```console
+docker compose up --build -d
+```
+
+Now you can run commands needed to work on the project. For example, say you want to install the dependencies on PHP 8.0:
+
+```console
+docker-compose run codice-fiscale-php-80 composer install
+```
+
+or for enter the container
+
+```console
+docker-compose exec codice-fiscale-php-80 sh
+```
+
+## Testing
+
+To run the test use the command below:
+
+```bash
+composer test
+```
diff --git a/README-it.md b/README-it.md
index d6c15a3..375f073 100644
--- a/README-it.md
+++ b/README-it.md
@@ -334,7 +334,7 @@ Test
 ----
 
 ``` bash
-$ vendor\bin\phpunit
+$ composer test
 ```
 
 
diff --git a/README.md b/README.md
index d35bf16..eabfa6e 100644
--- a/README.md
+++ b/README.md
@@ -334,7 +334,7 @@ Test
 ----
 
 ``` bash
-$ vendor\bin\phpunit
+$ composer test
 ```
 
 
diff --git a/composer.json b/composer.json
index 7e39779..02cb155 100644
--- a/composer.json
+++ b/composer.json
@@ -34,5 +34,11 @@
             "name": "davidepastore",
             "email": "pasdavide@gmail.com"
         }
-    ]
+    ],
+    "config": {
+        "sort-packages": true
+    },
+    "scripts": {
+        "test": "vendor/bin/phpunit"
+    }
 }
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..17220ce
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,18 @@
+version: '3.9'
+
+services:
+  codice-fiscale-71:
+    build: docker/php-7.1
+    container_name: codice-fiscale-php-71
+    working_dir: /app
+    tty: true
+    volumes:
+      - .:/app:cached
+
+  codice-fiscale-80:
+    build: docker/php-8.0
+    container_name: codice-fiscale-php-80
+    working_dir: /app
+    tty: true
+    volumes:
+      - .:/app:cached
diff --git a/docker/php-7.1/Dockerfile b/docker/php-7.1/Dockerfile
new file mode 100644
index 0000000..e5cdb53
--- /dev/null
+++ b/docker/php-7.1/Dockerfile
@@ -0,0 +1,3 @@
+FROM  php:7.1-alpine3.9
+
+COPY --from=composer:latest /usr/bin/composer /usr/local/bin/composer
diff --git a/docker/php-8.0/Dockerfile b/docker/php-8.0/Dockerfile
new file mode 100644
index 0000000..4459c8b
--- /dev/null
+++ b/docker/php-8.0/Dockerfile
@@ -0,0 +1,3 @@
+FROM  php:8.0-cli-alpine3.16
+
+COPY --from=composer:latest /usr/bin/composer /usr/local/bin/composer
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index d9374b7..029c218 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -2,7 +2,7 @@
 <phpunit bootstrap="./vendor/autoload.php">
 
     <testsuites>
-        <testsuite name="The project's test suite">
+        <testsuite name="Codice Fiscale test suite">
             <directory>./test</directory>
         </testsuite>
     </testsuites>
@@ -11,4 +11,4 @@
             <directory suffix=".php">./src</directory>
         </whitelist>
     </filter>
-</phpunit>
\ No newline at end of file
+</phpunit>