Add git installation in Dockerfile for de/mostrar_version command

Included the installation of git in the Dockerfile to support the de/mostrar_version command, ensuring necessary tools are available for version management. Updated the package list and cleaned up temporary files to maintain a lean image.

Author: botON

Dockerfile

@@ -2,6 +2,9 @@ FROM python:3.10-slim
 
 USER root
 
+# Install git for de /mostrar_version command.
+RUN apt-get update && apt-get install -y --no-install-recommends git && rm -rf /var/lib/apt/lists/*
+
 COPY . /pycamp/telegram_bot
 WORKDIR /pycamp/telegram_bot
 RUN pip3 install -U -e '.[dev]'