Also add seperate COPYRIGHT to npm package

Might perhaps not be strictly required, but this makes it easier to
find the copyright attributions for those who obtain the npm package.
Prepending the info to the main script remains necessary to also ship
the notices for every of the final server-to-client distributions.

Makefile

@@ -303,7 +303,7 @@ EMCC_COMMON_ARGS = \
 	#--memory-init-file 0 \
 	#-s OUTLINING_LIMIT=20000 \
 
-dist: src/subtitles-octopus-worker.bc dist/js/subtitles-octopus-worker.js dist/js/subtitles-octopus-worker-legacy.js dist/js/subtitles-octopus.js
+dist: src/subtitles-octopus-worker.bc dist/js/subtitles-octopus-worker.js dist/js/subtitles-octopus-worker-legacy.js dist/js/subtitles-octopus.js dist/js/COPYRIGHT
 
 dist/js/subtitles-octopus-worker.js: src/subtitles-octopus-worker.bc src/pre-worker.js src/SubOctpInterface.js src/post-worker.js build/lib/brotli/js/decode.js
 	mkdir -p dist/js
@@ -361,6 +361,9 @@ dist/license/all: dist/license/subtitlesoctopus $(addprefix dist/license/, $(LIB
 	build/license_lint.awk dist/license/all.tmp build/license_fullnotice
 	cat dist/license/all.tmp build/license_fullnotice > dist/license/all
 
+dist/js/COPYRIGHT: dist/license/all
+	cp "$<" "$@"
+
 # Clean Tasks
 
 clean: clean-dist clean-libs clean-octopus

package.json

@@ -4,7 +4,8 @@
   "description": "libass Subtitle Renderer and Parser library for browsers",
   "main": "dist/js/subtitles-octopus.js",
   "files": [
-    "dist/js/subtitles*"
+    "dist/js/subtitles*",
+    "dist/js/COPYRIGHT"
   ],
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",