chore(infra): simplify Docker builds and remove unused WEB_BUILD_PROFILE

- Adjusted Dockerfile’s build process for production-only artifacts.
- Removed unused `WEB_BUILD_PROFILE` from `dc-gui.yaml`.
- Optimized Gradle settings for better caching and performance.
- Updated `.dockerignore` to include source packages previously excluded by mistake.

.dockerignore

@@ -187,7 +187,7 @@ secrets/
 **/*.sqlite3
 **/postgres-data/
 **/redis-data/
-**/data/
+# REMOVED: **/data/ - This was excluding source packages named 'data' (e.g. at.mocode...data)
 
 # ===================================================================
 # Application specific exclusions