Builds custom Jar (#5029)

# Description of Changes

Change jar files to contain frontend if provided with param, else
doesnt... add release artifact -server version which wont have frontend

---

## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### Translations (if applicable)

- [ ] I ran
[`scripts/counter_translation.py`](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/docs/counter_translation.md)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.

app/core/src/main/java/stirling/software/SPDF/controller/web/ReactRoutingController.java

@@ -1,16 +1,17 @@
 package stirling.software.SPDF.controller.web;
 
+import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.GetMapping;
 
-// @Controller // Disabled - Backend-only mode, no Thymeleaf UI
+@Controller
 public class ReactRoutingController {
 
-    @GetMapping("/{path:^(?!api|static|robots\\.txt|favicon\\.ico)[^\\.]*$}")
+    @GetMapping("/{path:^(?!api|static|robots\\.txt|favicon\\.ico|pipeline|pdfjs|pdfjs-legacy|fonts|images|files|css|js)[^\\.]*$}")
     public String forwardRootPaths() {
         return "forward:/index.html";
     }
 
-    @GetMapping("/{path:^(?!api|static)[^\\.]*}/{subpath:^(?!.*\\.).*$}")
+    @GetMapping("/{path:^(?!api|static|pipeline|pdfjs|pdfjs-legacy|fonts|images|files|css|js)[^\\.]*}/{subpath:^(?!.*\\.).*$}")
     public String forwardNestedPaths() {
         return "forward:/index.html";
     }

app/core/src/main/resources/application.properties

@@ -52,7 +52,7 @@ server.servlet.session.timeout:30m
 springdoc.api-docs.path=/v1/api-docs
 # Set the URL of the OpenAPI JSON for the Swagger UI
 springdoc.swagger-ui.url=/v1/api-docs
-springdoc.swagger-ui.path=/index.html
+springdoc.swagger-ui.path=/swagger-ui.html
 # Force OpenAPI 3.0 specification version
 springdoc.api-docs.version=OPENAPI_3_0
 posthog.api.key=phc_fiR65u5j6qmXTYL56MNrLZSWqLaDW74OrZH0Insd2xq