Improve Demo Docker

Author: JoseIgnacioTamayo

oc_config_validate/demo/Dockerfile

@@ -1,11 +1,12 @@
 FROM python:3.9-slim-bullseye
 
-RUN apt-get update
-RUN apt-get install -y procps
+RUN apt-get update && apt-get install -y procps
 RUN pip3 install oc-config-validate
 
 WORKDIR /opt/oc_config_validate
 
 COPY ./* demo/
 
+RUN mkdir /opt/certs
+
 CMD /opt/oc_config_validate/demo/run_demo.sh -L -N