Remove sys_admin, add application variable

docker-compose.yml

@@ -28,8 +28,6 @@ services:
     image: invoiceninja/invoiceninja:5
     env_file: env
     restart: always
-    cap_add:
-      - SYS_ADMIN
     volumes:
       # you may use a bind-mounted host directory instead, so that it is harder to accidentally remove the volume and lose all your data!
       - ./config/hosts:/etc/hosts:ro

env

@@ -6,7 +6,9 @@ DB_HOST1=db
 DB_USERNAME1=ninja
 DB_PASSWORD1=ninja
 DB_DATABASE1=ninja
-PHANTOMJS_PDF_GENERATION=false
+
+#this is a system variable please do not remove
+IS_DOCKER=true
 
 #V4 env vars
 DB_STRICT=false