Merge pull request laradock#350 from geocine/cannot-open-nvm-sh-fix

fix for issue laradock#347

Author: philtrep

workspace/Dockerfile

@@ -150,7 +150,7 @@ ENV NVM_DIR /home/laradock/.nvm
 RUN if [ ${INSTALL_NODE} = true ]; then \
     # Install nvm (A Node Version Manager)
     curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.31.6/install.sh | bash && \
-        . ~/.nvm/nvm.sh && \
+        . $NVM_DIR/nvm.sh && \
         nvm install ${NODE_VERSION} && \
         nvm use ${NODE_VERSION} && \
         nvm alias ${NODE_VERSION} && \