build: add docker files

Author: ecastro98

README.md

@@ -55,3 +55,34 @@ $response = $mta->getResource('someResource')->call->callableFunction($arg1, $ar
 
 var_dump($response);
 ```
+
+# Development environment setup
+
+**Prerequisites**:
+- [docker-compose](https://docs.docker.com/compose/install/)
+
+First, we need to build the local docker image. To do this, run the following command:
+
+    $ docker-compose build
+
+We will be using an alias for executing the development commands.
+
+    $ alias dcli='docker-compose -f docker-compose.cli.yml run --rm'
+
+**Install dependencies**:
+
+    $ dcli composer install
+
+## Running tests
+
+To run the project tests and validate the coding standards:
+
+    $ dcli composer test
+
+To run all unit tests you can use:
+
+    $ dcli phpunit
+
+To run specific unit test you can use --filter option:
+
+    $ dcli phpunit --filter=ClassName::MethodName

docker-compose.cli.yml

@@ -0,0 +1,26 @@
+version: '3.7'
+services:
+  composer:
+    image: multitheftauto/mtasa-php-sdk:latest
+    init: true
+    volumes:
+      - .:/application
+      - composer-cache:/root/.composer/cache
+    entrypoint: composer
+
+  phpunit:
+    image: multitheftauto/mtasa-php-sdk:latest
+    init: true
+    volumes:
+      - .:/application
+    entrypoint: vendor/bin/phpunit
+
+  php:
+    image: multitheftauto/mtasa-php-sdk:latest
+    init: true
+    volumes:
+      - .:/application
+
+volumes: 
+  composer-cache:
+    name: composer-cache    

docker-compose.yml

@@ -0,0 +1,7 @@
+version: '3.7'
+services:
+  php:
+    build:
+      context: .
+      dockerfile: docker/Dockerfile
+    image: multitheftauto/mtasa-php-sdk:latest

docker/Dockerfile

@@ -0,0 +1,18 @@
+FROM php:7.1-cli
+
+RUN pecl install xdebug \
+    && docker-php-ext-enable xdebug
+
+# Install unzip for composer dependencies
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends unzip \
+    && apt-get autoremove -y
+
+ENV COMPOSER_ALLOW_SUPERUSER 1
+ENV COMPOSER_HOME /root/.composer
+
+COPY --from=composer:1.10.10 /usr/bin/composer /usr/bin/composer
+
+WORKDIR /application
+
+CMD ["php"]