Docker image user permissions fix (#1373) + got rid of empty continua…

…tion line warning

core/src/epicli/Dockerfile

@@ -5,6 +5,7 @@ ARG EPICLI_VERSION
 ARG USERNAME=epiuser
 ARG USER_UID=1000
 ARG USER_GID=$USER_UID
+ARG SHARED_DIR=/shared
 
 ENV DOCKER_CLI Yes
 
@@ -14,23 +15,24 @@ WORKDIR /epicli
 RUN apt-get update \
     && apt-get -y install gcc make musl-dev libffi-dev tar unzip openssh-client vim \
     && apt-get -y install ruby-full \
-    && gem install serverspec rake rspec_junit_formatter    
+    && gem install serverspec rake rspec_junit_formatter
 
 RUN pip install epicli-${EPICLI_VERSION}-py3-none-any.whl
 
 RUN groupadd --gid $USER_GID $USERNAME \
     && useradd -s /bin/bash --uid $USER_UID --gid $USER_GID -m $USERNAME \
     && apt-get install -y sudo \
-
     && echo $USERNAME ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/$USERNAME \
-    && chmod 0440 /etc/sudoers.d/$USERNAME \   
-
+    && chmod 0440 /etc/sudoers.d/$USERNAME \
     && apt-get autoremove -y \
     && apt-get clean -y \
-    && rm -rf /var/lib/apt/lists/*   
+    && rm -rf /var/lib/apt/lists/*
+
+RUN mkdir $SHARED_DIR \
+    ;chown :$USERNAME $SHARED_DIR \
+    && chmod g+w $SHARED_DIR
 
-RUN mkdir /shared/
-WORKDIR /shared
+WORKDIR $SHARED_DIR
 
 USER $USERNAME