ci: Improve Docker build workflow and update dependencies

- Add release type detection to distinguish between version tags and edge builds
- Implement separate Docker build steps for release and edge builds with appropriate tags
- Add edge and SHA-based image tags for main branch builds
- Update nginx configuration to support Vietnamese (vi) language routing
- Simplify nginx location block to handle static files and fallback to index.html
- Remove javascript-obfuscator and ts-migrate from dependencies
- Update README with simplified self-hosting instructions using npx http-server
- Consolidate multiple server setup examples into single recommended approach
- Update build preview command to use npm run preview instead of npx serve
- Improve localization files for German, English, Vietnamese, and Chinese
- Update worker files and TypeScript logic files for improved functionality
- Enhance PDF tool pages with better structure and internationalization support

public/locales/de/common.json

@@ -294,7 +294,7 @@
         "download": "Download:",
         "downloadSelected": "Auswahl herunterladen",
         "exportPdf": "PDF exportieren",
-        "uploadPdfFiles": "PDF-Dateien hochladen",
+        "uploadPdfFiles": "PDF-Dateien auswählen",
         "dragAndDrop": "PDF-Dateien hierhin ziehen oder klicken zum Auswählen",
         "selectFiles": "Dateien auswählen",
         "renderingPages": "Seiten werden gerendert...",