fix docker frontend: parameterize ckeditor build dir, use working default

.env.example

@@ -33,6 +33,10 @@
 # This is used to prevent people from using the new docker-compose file for automated installs
 LOCAL_DEV_CHECK=1
 
+# Set this to your ckeditor build output directory (which includes ckeditor.js) if you
+# want to develop ckeditor locally.
+CKEDITOR_BUILD_DIR=frontend/src/vendor/ckeditor/
+
 # This is the host from which you will be accessing the development servers locally
 PUBLIC_HOST=localhost
 

docker-compose.yml

@@ -67,7 +67,7 @@ services:
     command: "npm run serve"
     volumes:
       - ".:/home/dev/openproject"
-      - "../commonmark-ckeditor-build/build/:/home/dev/openproject/frontend/src/vendor/ckeditor/"
+      - "${CKEDITOR_BUILD_DIR:-./frontend/src/vendor/ckeditor/}:/home/dev/openproject/frontend/src/vendor/ckeditor/"
     ports:
       - "4200:4200"
     environment: