Optimize Dokerfile

Dockerfile

@@ -4,13 +4,14 @@ LABEL Maintainer="serega404"
 
 WORKDIR /app
 
-COPY main.py main.py
 COPY ./requirements.txt requirements.txt
 RUN pip3 install -r requirements.txt
 
 COPY crontab /etc/cron.d/crontab
 RUN chmod 0644 /etc/cron.d/crontab
 
+COPY main.py main.py
+
 RUN /usr/bin/crontab /etc/cron.d/crontab
 
 # run crond as main process of container