merging of dev branch into master

[kevindublin]

I had a few issues that prevented me from getting the project launched on Ubuntu 18.04. I think some were self-inflicted (why did I run "npm audit fix" after updating a few dependencies individually in the "Update Dependencies" challenge task?), but I figured I'd communicate them to explain why it took me so long to get this completed and, more importantly, demonstrate issues others might encounter who take the challenge. The first has already been corrected:

./docker-compose.yml

• Line 14 & Line 26 were missing forward slashes at the beginning of the respective file paths.

./application/Dockerfile

• Line 3 the file path kept failing to find the directory with "node" present in the pathway, despite being defined that way in the docker-compose.yml.
• Line 5, since the commands are virtually the same and a URL wasn't being used, I switched the ADD command to COPY and copied over the entire directory instead of just the "package.json," so the "src" folder would copy as well. In retrospect I shouldn't want the node_modules etc. to copy over since that's built on start, will refactor, but worried it might break at the moment.
• Line 7 I originally added "RUN ls -al" to check where files were actually being copied, deleted now

./server/Dockerfile

• Line 5 see line 3 above.
• Line 7 see line 5 above.
• Line 9 see line 7 above

./application/package.json

• Line 14 "audit fix" auto updates "react-scripts" to version 3.4.1 which creates a nasty bug which forces a silent exit code 0. I downgraded to 3.4.0 here, but it looks like one of the other options is to add stdin_open: true to docker-compose.yml.

./application/src/private.js

• Line 3 Nothing is running at localhost or the IP specified by React development server. While I could load the web app, it wouldn't connect to the server from the default IP. I had to force it to the default, even though I'm not on Windows. Temporary workaround to complete the other challenges.