chore: Update node version used in docker (#675)

* Update Dockerfile to use node 14

14 matches the major version of node as declared in the package.json
   file.

* Update package-lock.json

Updated the package-lock.json file with the result of running `npm
install` from within the Docker container. That way, the lock file and
the execution environment will be in sync.

* Use node16, to be on par with github actions node version

* Update package-lock file for node-16

Dockerfile

@@ -1,4 +1,4 @@
-FROM node:12.16.0
+FROM node:16
 
 WORKDIR /app