Bumps nginx from `c083c37` to `b0f7830`.
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Bumps nginx from `8491795` to `c083c37`.
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Bumps node from 20-alpine to 25-alpine.
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# Description of Changes
This pull request introduces several improvements focused on security
and reliability in both the Docker build process and the backend API.
The most significant changes are the use of digest-pinned Docker base
images to ensure reproducible builds, safer handling of user-provided
filenames in error messages, and a switch to more reliable dependency
installation in CI workflows.
**Docker image security and reproducibility:**
* All Dockerfiles now use digest-pinned base images (e.g.,
`node:20-alpine@sha256:...`, `gradle:8.14-jdk21@sha256:...`,
`alpine:3.22.1@sha256:...`, `nginx:alpine@sha256:...`) to guarantee
build consistency and protect against upstream image changes.
[[1]](diffhunk://#diff-f8faae0938488156cf26e9322ffdf755deaa8770a7ac8c524dd6126c19548888L5-R5)
[[2]](diffhunk://#diff-f8faae0938488156cf26e9322ffdf755deaa8770a7ac8c524dd6126c19548888L18-R18)
[[3]](diffhunk://#diff-f8faae0938488156cf26e9322ffdf755deaa8770a7ac8c524dd6126c19548888L38-R38)
[[4]](diffhunk://#diff-2f5cd3ad965c86a7a5b4af6e0513ad294e0426644d9f5b5358dfb16a2ef995a7L5-R5)
[[5]](diffhunk://#diff-2f5cd3ad965c86a7a5b4af6e0513ad294e0426644d9f5b5358dfb16a2ef995a7L18-R18)
[[6]](diffhunk://#diff-2f5cd3ad965c86a7a5b4af6e0513ad294e0426644d9f5b5358dfb16a2ef995a7L37-R37)
[[7]](diffhunk://#diff-e9edf3a05475d0721a0e65be1ba0eeb162ae972891b0f6d7e1285687efab1de0L9-R9)
[[8]](diffhunk://#diff-fa0700cfd7d90d832649eb1d0503904564bb3b28c48972be7d9f17e4ce32a3dcL9-R9)
[[9]](diffhunk://#diff-2e766aaf0c87e7b8a62d2a2986f6999c38cc35f677479e31b77d1b427c7aeef7L5-R5)
[[10]](diffhunk://#diff-1726db0cbef194c9be3cba9825c0794802b154e15e4c892c1544d0aace03e037L5-R5)
[[11]](diffhunk://#diff-c1b6dd504a16fc68cd064baf9cf07d9dd31da56eb55de69601844ab03a5ae319L5-R5)
[[12]](diffhunk://#diff-2fc7fcfcfdbb617dd8fbb6b1a2ea5709f9018d618d13942cb33d3e0ed127df16L5-R5)
[[13]](diffhunk://#diff-2fc7fcfcfdbb617dd8fbb6b1a2ea5709f9018d618d13942cb33d3e0ed127df16L39-R39)
[[14]](diffhunk://#diff-759e94102d21fe6f9bde8ddb0b4f95b5d5cd214b0355ea0419d3ea6c09e8ffbfL2-R2)
[[15]](diffhunk://#diff-759e94102d21fe6f9bde8ddb0b4f95b5d5cd214b0355ea0419d3ea6c09e8ffbfL19-R19)
**Backend API security:**
* In `ConvertEmlToPDF.java`, error messages now escape user-provided
filenames using `HtmlUtils.htmlEscape`, preventing potential XSS
vulnerabilities when displaying error messages that include filenames.
[[1]](diffhunk://#diff-45d22a96bae3e8a746b7fb2c39e25c80aee0bf733b528a3517db8fdd2a3d25cdR13)
[[2]](diffhunk://#diff-45d22a96bae3e8a746b7fb2c39e25c80aee0bf733b528a3517db8fdd2a3d25cdR156-R170)
**CI/CD reliability:**
* All GitHub Actions workflows (`multiOSReleases.yml`,
`releaseArtifacts.yml`, `tauri-build.yml`) now use `npm ci` instead of
`npm install` for frontend dependency installation, ensuring clean,
reproducible installs that match the lockfile.
[[1]](diffhunk://#diff-895b214ee023c8c26048a2a3b946cfb1ebc4f26fbc8a9c2fa54b77c12e763b6bL271-R271)
[[2]](diffhunk://#diff-699ff98fe113446c403eb07daf16dd1966c2a047ab0b9f7e38fd695d079f7dddL177-R177)
[[3]](diffhunk://#diff-b34ab107dd4bc92075b2e89b6f16e4a2813e267ca7c2afebdb1931a0a3900d5aL177-R177)
---
## 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.
This PR restructures testing scripts and Docker configurations to use centralized compose files, introduces new Docker Compose variants with integrated frontend services, and updates related CI workflows.
Migrate test scripts to reference testing/compose files and streamline test flows with forced rebuilds and direct curl checks.
Add ultra-lite, security, and security-with-login compose files under testing/compose, each defining both backend and frontend services.
Rename and adjust frontend imports and update CI workflows to build and validate the frontend separately.
