panel - enable proper logger that will show up in the console (#320)

[usage](https://docs.python.org/3/library/logging.html):

```py
import logging
logger = logging.getLogger(__name__)
logger.info("hi")
```

Reviewed-on: Fediversity/Fediversity#320
Reviewed-by: Valentin Gagarin <valentin.gagarin@tweag.io>
Co-authored-by: Kiara Grouwstra <kiara@procolix.eu>
Co-committed-by: Kiara Grouwstra <kiara@procolix.eu>

panel/src/panel/settings.py

@@ -171,6 +171,53 @@ COMPRESS_PRECOMPILERS = [
 
 DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
 
+LOGGING = {
+    "version": 1,
+    "disable_existing_loggers": False,
+    "filters": {
+        "require_debug_false": {
+            "()": "django.utils.log.RequireDebugFalse",
+        },
+        "require_debug_true": {
+            "()": "django.utils.log.RequireDebugTrue",
+        },
+    },
+    "formatters": {
+        "django.server": {
+            "()": "django.utils.log.ServerFormatter",
+            "format": "[{server_time}] {message}",
+            "style": "{",
+        },
+        "standard": {
+            "format": "%(asctime)s [%(levelname)s] %(name)s: %(message)s"
+        },
+    },
+    "handlers": {
+        "console": {
+            "level": "INFO",
+            # "filters": ["require_debug_true"],
+            "class": "logging.StreamHandler",
+            "formatter": "standard",
+        },
+        "django.server": {
+            "level": "INFO",
+            "class": "logging.StreamHandler",
+            "formatter": "django.server",
+        },
+        "mail_admins": {
+            "level": "ERROR",
+            "filters": ["require_debug_false"],
+            "class": "django.utils.log.AdminEmailHandler",
+        },
+    },
+    "loggers": {
+        "": {
+            "handlers": ["console"],
+            "level": "DEBUG" if DEBUG else "INFO",
+        },
+    },
+}
+
 # Customization via user settings
 # This must be at the end, as it must be able to override the above
 # TODO(@fricklerhandwerk):