docs: Update documentation for modernization changes

- Update readme.hints.md with Ubuntu 24.04 upgrade notes, package changes,
  MongoDB 8.0 details, and corrected NVM/Node version references
- Update readme.md with Ubuntu 24.04 tag description and adjusted image sizes

readme.hints.md

@@ -1,6 +1,6 @@
 # Technical Implementation Notes
 
-## NVM Support (v5.0.147)
+## NVM Support (v5.2.0)
 
 ### How NVM Works in This Image
 
@@ -30,7 +30,7 @@ The image provides full nvm support in three contexts:
 - Critical for CI/CD workflow support
 
 #### 4. ENV PATH Fallback
-- Maintains `ENV PATH` pointing to default Node v20.12.2
+- Maintains `ENV PATH` pointing to default Node v24.13.0
 - Ensures non-bash shells (sh, dash) still have node access
 - Backward compatible with existing usage
 
@@ -74,10 +74,23 @@ RUN node --version      # Now shows v18.x.x
 
 ### Maintenance Notes
 
-**If updating nvm version**: Modify line 86 in Dockerfile
+**If updating nvm version**: Modify line 87 in Dockerfile (currently NVM v0.40.1)
 
 **If base image changes**: Verify /etc/bash.bashrc structure still has early return pattern
 
+## Ubuntu 24.04 Upgrade Notes
+
+- Base image upgraded from Ubuntu 20.04 to 24.04
+- Python 2 removed (EOL since 2020), Python 3 retained
+- Package changes for 24.04 compatibility:
+  - `gconf-service` and `libgconf-2-4` removed (deprecated GConf)
+  - `libgcc1` replaced with `libgcc-s1`
+  - `libappindicator1` replaced with `libayatana-appindicator3-1`
+  - `libasound2` replaced with `libasound2t64` (t64 transition)
+  - `libgbm1` and `libatk-bridge2.0-0` added for Chrome/Puppeteer
+- MongoDB upgraded from 4.4 to 8.0 (uses modern gpg keyring approach instead of deprecated apt-key)
+- Node.js upgraded to v24.13.0 LTS (Krypton, supported until April 2028)
+
 **If ENTRYPOINT conflicts**: Users can override with `--entrypoint` flag:
 ```bash
 docker run --entrypoint /bin/bash image -c "commands"