java frontend (#5097)

# Description of Changes

<!--
Please provide a summary of the changes, including:

- What was changed
- Why the change was made
- Any challenges encountered

Closes #(issue_number)
-->

---

## 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.

---------

Co-authored-by: Reece <reece@stirlingpdf.com>
Co-authored-by: Reece Browne <74901996+reecebrowne@users.noreply.github.com>

.github/workflows/push-docker.yml

@@ -107,7 +107,7 @@ jobs:
         with:
           builder: ${{ steps.buildx.outputs.name }}
           context: .
-          file: ./Dockerfile
+          file: ./docker/embedded/Dockerfile
           push: true
           cache-from: type=gha
           cache-to: type=gha,mode=max
@@ -152,7 +152,7 @@ jobs:
         if: github.ref != 'refs/heads/main'
         with:
           context: .
-          file: ./Dockerfile.ultra-lite
+          file: ./docker/embedded/Dockerfile.ultra-lite
           push: true
           cache-from: type=gha
           cache-to: type=gha,mode=max
@@ -183,7 +183,7 @@ jobs:
         with:
           builder: ${{ steps.buildx.outputs.name }}
           context: .
-          file: ./Dockerfile.fat
+          file: ./docker/embedded/Dockerfile.fat
           push: true
           cache-from: type=gha
           cache-to: type=gha,mode=max