chore(docker): expand .dockerignore to exclude mobile, gradle, kotlin, and local build artifacts

.dockerignore

@@ -1,18 +1,55 @@
-node_modules
-.output
-.nuxt
-node_modules/.cache
+# Version Control
 .git
 .gitignore
+
+# Dependencies & Cache
+node_modules
+**/node_modules
+.output
+.nuxt
+dist
+.cache
+*.log
+
+# Environment variables
 .env
 .env.*
+.env.local
 !.env.example
 !.env.example.coolify
-dist
-*.log
-*.canvas
 
-# Exclude non-web monorepo apps from Docker build context
+# Native Mobile (Android)
 apps/mobile
+app
+.gradle
+**/.gradle
+.kotlin
+build
+**/build
+local.properties
+*.apk
+*.aab
+
+# Desktop CLI & Contracts build
 apps/desktop
 packages/shared-contracts/dist
+
+# Legacy configs & DB dumps
+docker/legacy-server
+*.sql
+*.sqlite
+*.db
+
+# Notes, Mindmaps & Brainstorming
+.obsidian
+.qwen
+scratch
+scripts
+*.canvas
+
+# IDE settings
+.idea
+.vscode
+*.iml
+*.ipr
+*.iws