Updated version of Angular and other front-end frameworks (dtinit#1113)

* updated versions of front-end frameworks

* marked package-lock as auto-generated

* added merging strategy for auto generated files

* minor gitattributes fix

.gitattributes

@@ -16,3 +16,7 @@
 # Denote all files that are truly binary and should not be modified.
 *.png binary
 *.jpg binary
+
+package-lock.json -diff -merge
+package-lock.json linguist-generated=true
+

Documentation/Developer.md

@@ -36,7 +36,7 @@ From the top level data-transfer-project directory:
 * Install Git: `sudo apt-get install git-all`
 * Install Gradle: `sudo apt-get install gradle`
  * Install NVM: `curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.0/install.sh | bash`
- * Install Node: [mac installer](https://nodejs.org/dist/v10.16.3/node-v10.16.3.pkg) or `nvm install v10.16.3`
+ * Install Node: [mac installer](https://nodejs.org/dist/v16.15.1/node-v16.15.1.pkg) or `nvm install v16.15.1`
  * Install Angular: `npm install -g @angular/cli`
  * [Install Docker](https://docs.docker.com/install/)
  * Install the Angular CLI `./gradlew client-rest:installLocalAngularCli`