Update Dockerfile-example

Dockerfile-example

@@ -10,7 +10,7 @@ COPY . /app
 # Install any needed packages specified in requirements.txt
 RUN pip install --no-cache-dir -r requirements.txt
 
-# Update the package index and install vim-tiny
+# Update the package index and install Midnight Commander
 RUN apt-get update && \
     apt-get install -y mc && \
     rm -rf /var/lib/apt/lists/*