doc: Add example of running Poetry to README.md

.github/workflows/docker-image.yml

@@ -39,7 +39,7 @@ jobs:
     strategy:
       matrix:
         python_image_tag: ["3.8-slim", "3.9-slim", "3.10-slim", "3.11-slim", "3.12-slim"]
-        poetry_version: ["1.5.1", "1.6.1"]
+        poetry_version: ["1.6.1", "1.7.0"]
 
     steps:
     - uses: actions/checkout@v3

README.md

@@ -24,6 +24,8 @@ Most of the time, you will be using these images as a base image for your own
 Dockerfiles (e.g. devcontainers, building Python applications, etc.)
 ```Dockerfile
 FROM thehale/python-poetry
+
+RUN poetry --version
 # Your build steps here.
 ```