modification of the code markdown in the file readme.md

Author: codeurH24

README.md

@@ -12,11 +12,17 @@ cd ..
 docker run -d --rm -p 8080:80 -p 8000:8000 --name backend -v %CD%/volume:/volume --ip 192.168.33.225 php_backend_dev
 ```
 **docker run** to create virtualization of the image.
+
 **-d** For stdout output.
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 **--rm** delete the container when the virtualization is finished.
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 **-p** real port corresponds to the virtual port. realport:virtuelport
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 **--name** Name of virtualization to start or stop.
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 **-v** Real folder corresponds to the virtual folder.
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 **php_backend_dev** Name of our image to running.
 
 # Source code for work