[UI] use only one logger adapter and update Dockerfile (#2646)

* [UI] use only one logger adapter and update Dockerfile
* remove setLevel on logger

ui/operator_ui/adapters/logger.py

@@ -0,0 +1,46 @@
+import logging
+from logging.config import dictConfig
+
+dictConfig(
+    {
+        "version": 1,
+        "disable_existing_loggers": True,
+        "formatters": {
+            "json": {
+                "class": "pythonjsonlogger.jsonlogger.JsonFormatter",
+                "format": "%(asctime)s %(levelname)s: %(message)s",
+            }
+        },
+        "handlers": {
+            "stream_handler": {
+                "class": "logging.StreamHandler",
+                "formatter": "json",
+                "stream": "ext://flask.logging.wsgi_errors_stream",
+            }
+        },
+        "root": {
+            "level": "INFO",
+            "handlers": ["stream_handler"]
+        }
+    }
+)
+
+
+class Logger:
+    def __init__(self):
+        self.logger = logging.getLogger(__name__)
+
+    def debug(self, msg: str, *args, **kwargs):
+        self.logger.debug(msg, *args, **kwargs)
+
+    def info(self, msg: str, *args, **kwargs):
+        self.logger.info(msg, *args, **kwargs)
+
+    def error(self, msg: str, *args, **kwargs):
+        self.logger.error(msg, *args, **kwargs)
+
+    def exception(self, msg: str, *args, **kwargs):
+        self.logger.exception(msg, *args, **kwargs)
+
+
+logger = Logger()