[DO NOT MERGE] Use nodejs-16 Docker baseimage branch

This is just for testing to ensure everything works before we merge pelias/docker-baseimage#24

Dockerfile

@@ -1,5 +1,5 @@
 # base image
-FROM pelias/baseimage
+FROM pelias/baseimage:nodejs-16
 
 # download apt dependencies
 # note: this is done in one command in order to keep down the size of intermediate containers