fix: update python and dockerfile

Signed-off-by: Martin Buchleitner <[email protected]>

Dockerfile

@@ -1,5 +1,5 @@
 # Use an official Python runtime as a parent image
-FROM python:3.7-slim
+FROM python:3.12-slim
 
 # Set the working directory to /app
 WORKDIR /app
@@ -14,7 +14,7 @@ RUN pip install --trusted-host pypi.python.org -r /app/requirements.txt
 EXPOSE 80
 
 # Define environment variable
-ENV NAME World
+ENV NAME=World
 
 # Run app.py when the container launches
 CMD ["python", "app.py"]

src/requirements.txt

@@ -1 +1 @@
-Flask
+Flask>=3

training-prerequisites.md

@@ -6,19 +6,16 @@ Have the images in a registry available for attendees
 
 $ git clone https://github.com/infralovers/training-flask-app
 $ cd training-flask-app/
-$ $CR_PAT | docker login ghcr.io -u USERNAME --password-stdin
+$ echo $CR_PAT | docker login ghcr.io -u USERNAME --password-stdin
 
-$ docker build -t friendlyhello .
-$ docker tag friendlyhello ghcr.io/infralovers/training-flask-app:v1
+$ docker build -t ghcr.io/infralovers/training-flask-app:v1 .
 $ docker push ghcr.io/infralovers/training-flask-app:v1
 
 $ git switch v2
-$ docker build -t training-flask-app:v2 .
-$ docker tag training-flask-app:v2 ghcr.io/infralovers/training-flask-app:v2
+$ docker build -t ghcr.io/infralovers/training-flask-app:v2 .
 $ docker push ghcr.io/infralovers/training-flask-app:v2
 
 $ git switch v3
-$ docker build -t training-flask-app:v3 .
-$ docker tag training-flask-app:v3 ghcr.io/infralovers/training-flask-app:v3
+$ docker build -t ghcr.io/infralovers/training-flask-app:v3 .
 $ docker push ghcr.io/infralovers/training-flask-app:v3
 ```