build: Fix issue with Docker build

- GrumPHP composer plugin is running during the Docker build
  - Added flag to ignore plugins and dev dependencies
- Update tag in README to 3.0.0

Dockerfile

@@ -4,7 +4,7 @@ ADD composer.* ./
 ADD src/ src
 
 RUN composer global require hirak/prestissimo --no-plugins --no-scripts
-RUN composer install --optimize-autoloader --prefer-dist --no-progress --no-interaction --ignore-platform-reqs
+RUN composer install --no-dev --optimize-autoloader --prefer-dist --no-progress --no-interaction --ignore-platform-reqs --no-plugins
 
 FROM php:7.2.34-cli-alpine3.12 AS phuml
 MAINTAINER Luis Montealegre <[email protected]>

README.md

@@ -16,10 +16,10 @@ It creates a class diagram from an Object-Oriented codebase based on the UML spe
 The official phUML Docker image can be found on [Docker Hub](https://hub.docker.com/r/montealegreluis/phuml/).
 
 ```bash
-docker pull montealegreluis/phuml:2.0.0
+docker pull montealegreluis/phuml:3.0.0
 ```
 
-You can replace `2.0.0` with any of the available [tags](https://hub.docker.com/r/montealegreluis/phuml/tags?page=1&ordering=last_updated)
+You can replace `3.0.0` with any of the available [tags](https://hub.docker.com/r/montealegreluis/phuml/tags?page=1&ordering=last_updated)
 
 ### Composer
 

docs/installation.md

@@ -5,10 +5,10 @@
 The official phUML Docker image can be found on [Docker Hub](https://hub.docker.com/r/montealegreluis/phuml/).
 
 ```bash
-docker pull montealegreluis/phuml:2.0.0
+docker pull montealegreluis/phuml:3.0.0
 ```
 
-You can replace `2.0.0` with any of th available [tags](https://hub.docker.com/r/montealegreluis/phuml/tags?page=1&ordering=last_updated)
+You can replace `3.0.0` with any of th available [tags](https://hub.docker.com/r/montealegreluis/phuml/tags?page=1&ordering=last_updated)
 
 ## Composer