Updated Dockerfile and entrypoint to use pm2 instead of forever

backend/entrypoint.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
 set -eu
 
-CMD="pm2-runtime ecosystem.config.js"
+CMD="pm2-runtime pm2.config.js"
 
 # if the first arg starts with "-" pass it to program
 if [ "${1#-}" != "$1" ]; then

backend/pm2.config.js

@@ -0,0 +1,7 @@
+module.exports = {
+    apps : [{
+      name   : "YoutubeDL-Material",
+      script : "./app.js",
+      watch  : "placeholder"
+    }]
+}