Set environment paths in service for apprise-api-install.sh

[SystemIdleProcess]

Add environment variables for Apprise service configuration.

✍️ Description

Add environment values to service for persistent storage directories to install.
Need help adding/fixing for update/main script

🔗 Related Issue

Fixes #

✅ Prerequisites (X in brackets)

• Self-review completed – Code follows project standards.
• Tested thoroughly – Changes work as expected.
• No security risks – No hardcoded secrets, unnecessary privilege escalations, or permission issues.

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🛠️ Type of Change (X in brackets)

• 🐞 Bug fix – Resolves an issue without breaking functionality.
• ✨ New feature – Adds new, non-breaking functionality.
• 💥 Breaking change – Alters existing functionality in a way that may require updates.
• 🆕 New script – A fully functional and tested script or script set.
• 🌍 Website update – Changes to script metadata (PocketBase/website data).
• 🔧 Refactoring / Code Cleanup – Improves readability or maintainability without changing functionality.
• 📝 Documentation update – Changes to README, AppName.md, CONTRIBUTING.md, or other docs.

[SystemIdleProcess]

With the recent update to apprise-api I discovered my configuration within the app was gone. After looking into it I found that the /config directory was completely empty other than the store directory which was also empty. My assumption that the app would automatically use the root folders for config, attach and plugin was incorrect and I am at fault for not checking as part of the testing the script creation. This will resolve new installs but I don't know how to fix it for updates since they typically don't touche the service other then to stop and start. I'm still learning...

[michelroegl-brunner]

LGTM