Update Dockerfile-example

Dockerfile-example

@@ -12,7 +12,7 @@ RUN pip install --no-cache-dir -r requirements.txt
 
 # Update the package index and install vim-tiny
 RUN apt-get update && \
-    apt-get install -y vim-tiny && \
+    apt-get install -y mc && \
     rm -rf /var/lib/apt/lists/*
 
 # Run main.py when the container launches