Nightwatch config for selenium-server and gitignore changes

Changes

• The selenium-server path in the Nightwatch config uses require instead of hardcoding the path to selenium-server
• Add logs/ to .gitignore so that Selenium server logs don't get added to the git repository

A concern was raised by tusooa regarding a mention of the package outside deps. Viewing this example, I figured we could use the require method used by chromedriver instead of hardcoding it if that makes sense.

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For note, the Selenium server only runs if you have the same version of the Chromium browser as the chromedriver uses. See log below:

Error
    An error occurred while creating a new Selenium Server session: [SessionNotCreatedError] session not created: This version of ChromeDriver only supports Chrome version 108
Current browser version is 111.0.5563.64 with binary path /usr/bin/chromium

And given the insanely fast pace that Chromium gets new major versions at, I'm not sure how we should approach this. Besides, the only unit test we have in Nightwatch fails because it checks that the default "Welcome to your Vue.js App" page is shown. See log below:

TEST FAILURE (1m 44s):  
   - 1 assertions failed; 1 passed

   ✖ 1) test

   – default e2e tests (1m 42s)

   → ✖ NightwatchAssertError
   Testing if element <.hello> is present in 5000ms - expected "is present" but got: "not present" (5328ms)

so... that test isn't run in the pipeline?

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merged

mentioned in commit 7a7d8027