add gpg public_key ipmort

README.md

@@ -2,6 +2,36 @@
 
 LX Tools Installer  is a GUI for simple install, update, and remove Apps from ilunix.de
 
+## Build
+
+Create a compatible AppImage:
+```bash
+./build_compatible.sh
+```
+
+This creates:
+- `lxtools_installer{VERSION}-x86_64.AppImage` - The executable
+- `lxtools_installer{VERSION}-x86_64.AppImage.sha256` - SHA256 checksum
+- `lxtools_installer{VERSION}-x86_64.AppImage.asc` - GPG signature (if configured)
+
+## GPG Setup
+
+To enable GPG signing:
+```bash
+./gpg_setup.sh
+```
+
+## Verification
+
+Verify the downloaded AppImage:
+```bash
+# Check SHA256
+sha256sum -c lxtools_installer{VERSION}-x86_64.AppImage.sha256
+
+# Verify GPG signature (requires public key)
+gpg --import public_key.asc
+gpg --verify lxtools_installer{VERSION}-x86_64.AppImage.asc lxtools_installer{VERSION}-x86_64.AppImage
+```
 
 # Screenshots
 [![wire-py.png](https://fb.ilunix.de/api/public/dl/ZnfG9gxv?inline=true)](https://fb.ilunix.de/share/ZnfG9gxv)