added test for ssh-mitm

.github/workflows/applications.yml

@@ -38,3 +38,9 @@ jobs:
         python -m python_appimage build app applications/xonsh
         test -e xonsh-x86_64.AppImage
         ./xonsh-x86_64.AppImage -c 'import xonsh'
+
+    - name: Test ssh-mitm
+      run: |
+        python -m python_appimage build app applications/ssh-mitm
+        test -e ssh-mitm-x86_64.AppImage
+        ./ssh-mitm-x86_64.AppImage -c 'import ssh_proxy_server'