Support for CORS is missing
The process engine does not send CORS (Cross-origin resource sharing) header fields in the response header.
CORS support is currently provided by the reverse proxy (see cors.conf), which is unused for a personal installation of the DECODER Project tool-chain using docker-deployment.
The support can be achieved using the following code snippet:
from flask import Flask
from flask_cors import CORS
app = Flask(__name__)
cors = CORS(app, origins="*", methods=["GET", "POST", "PUT", "DELETE", "OPTIONS"], allow_headers=["Origin", "Content-Type", "Accept", "key"])