[TASK] Use node:12 base container

Resolves: DEV-375

.gitignore

@@ -11,4 +11,5 @@ build_php71
 build_php72
 build_php73
 build_bamboo
-.idea
\ No newline at end of file
+build_js
+.idea

Makefile

@@ -63,7 +63,7 @@ FULLVERSION_PHP73=$(MAJOR_PHP73).$(MINOR_PHP73).$(PATCHLEVEL_PHP73)
 SHORTVERSION_PHP73=$(MAJOR_PHP73).$(MINOR_PHP73)
 
 NAME_JS = typo3gmbh/js
-MAJOR_JS=1
+MAJOR_JS=2
 MINOR_JS=0
 PATCHLEVEL_JS=0
 FULLVERSION_JS=$(MAJOR_JS).$(MINOR_JS).$(PATCHLEVEL_JS)

js/Dockerfile

-FROM node:8
+FROM node:12
 MAINTAINER TYPO3 GmbH <info@typo3.com>
 
 ADD . /pd_build