Added app monolog channel

Author: Surfoo

.gitignore

@@ -33,3 +33,5 @@
 ###> phpstan/phpstan ###
 phpstan.neon
 ###< phpstan/phpstan ###
+
+docs

config/packages/monolog.yaml

@@ -1,6 +1,7 @@
 monolog:
     channels:
         - deprecation # Deprecations are logged in the dedicated "deprecation" channel when it exists
+        - app # Application-level errors (business logic), logged with extra context
 
 when@dev:
     monolog:
@@ -9,11 +10,16 @@ when@dev:
                 type: stream
                 path: "%kernel.logs_dir%/%kernel.environment%.log"
                 level: debug
-                channels: ["!event"]
+                channels: ["!event", "!app"]
             console:
                 type: console
                 process_psr_3_messages: false
                 channels: ["!event", "!doctrine", "!console"]
+            app:
+                type: stream
+                path: "%kernel.logs_dir%/app.log"
+                level: debug
+                channels: [app]
 
 when@test:
     monolog:
@@ -37,7 +43,7 @@ when@prod:
                 action_level: error
                 handler: nested
                 excluded_http_codes: [404, 405]
-                channels: ["!deprecation"]
+                channels: ["!deprecation", "!app"]
                 buffer_size: 50 # How many messages should be saved? Prevent memory leaks
             nested:
                 type: stream
@@ -53,3 +59,9 @@ when@prod:
                 channels: [deprecation]
                 path: php://stderr
                 formatter: monolog.formatter.json
+            app:
+                type: stream
+                channels: [app]
+                path: php://stderr
+                level: debug
+                formatter: monolog.formatter.json

config/services.yaml

@@ -55,3 +55,6 @@ services:
 
     # add more service definitions when explicit configuration is needed
     # please note that last definitions always *replace* previous ones
+    App\Monolog\AppContextProcessor:
+        tags:
+            - { name: monolog.processor, channel: app }