Test Docker build and run on all changes

Author: erikwebb

.github/workflows/3x.yml

@@ -49,6 +49,17 @@ jobs:
           path: terminus.phar
           if-no-files-found: error
 
+  build_docker_image:
+    runs-on: ubuntu-latest
+    name: Build Docker image
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Build Docker image
+        run: docker build . -t terminus
+      - name: Run built Docker image
+        run: docker run terminus art
+
   functional:
     runs-on: ${{ matrix.operating-system }}
     name: Functional testing matrix - PHP ${{ matrix.php-versions }} on ${{ matrix.operating-system }}

README.md

@@ -80,7 +80,7 @@ sudo ln -s ~/terminus/terminus /usr/local/bin/terminus
 Terminus can also be built and run as a Docker container, rather than relying on system version of PHP and other dependencies.
 
 ```bash
-docker build . -f Dockerfile -t terminus
+docker build . -t terminus
 ```
 
 In order to store configuration and install plugins, Terminus requires a persistent data directory. If you only plan to run Terminus via Docker, please run the following command to create a Docker data volume: