Merge branch 'master' of https://github.com/laradock/laradock into dev

* 'master' of https://github.com/laradock/laradock:
  update Install Symfony steps in the docs
  Update docker-compose.yml
  Update env-example
  Update Dockerfile-70
  fix rm error

workspace/Dockerfile-70

@@ -545,6 +545,19 @@ RUN if [ ${INSTALL_IMAGE_OPTIMIZERS} = true ]; then \
     ;fi\
 ;fi
 
+#####################################
+# PYTHON:
+#####################################
+
+ARG INSTALL_PYTHON=false
+ENV INSTALL_PYTHON ${INSTALL_PYTHON}
+RUN if [ ${INSTALL_PYTHON} = true ]; then \
+  apt-get update \
+  && apt-get -y install python python-pip python-dev build-essential  \
+  && pip install --upgrade pip  \
+  && pip install --upgrade virtualenv \
+;fi
+
 #
 #--------------------------------------------------------------------------
 # Final Touch