- add recipe files for appimagebuilder

.gitignore

@@ -22,6 +22,9 @@
 .vscode
 /src/gl/unused
 /mapfiles_release/*.map
+/AppDir
+/appimage-build
+*.AppImage
 .DS_Store
 /build_vc2017-32
 /build2

AppImageBuilder.yml

@@ -0,0 +1,45 @@
+# appimage-builder recipe see https://appimage-builder.readthedocs.io for details
+version: 1
+AppDir:
+  path: ./AppDir
+  app_info:
+    id: com.GZDoom.app
+    name: GZDoom
+    icon: game_icon.png
+    version: latest
+    exec: ./gzdoom
+    exec_args: $@
+  apt:
+    arch: amd64
+    allow_unauthenticated: true
+    sources:
+    - sourceline: deb http://us.archive.ubuntu.com/ubuntu/ jammy main restricted
+    - sourceline: deb http://us.archive.ubuntu.com/ubuntu/ jammy-updates main restricted
+    include: []
+  files:
+    include: []
+    exclude:
+    - usr/share/man
+    - usr/share/doc/*/README.*
+    - usr/share/doc/*/changelog.*
+    - usr/share/doc/*/NEWS.*
+    - usr/share/doc/*/TODO.*
+  test:
+    fedora-30:
+      image: appimagecrafters/tests-env:fedora-30
+      command: ./AppRun
+    debian-stable:
+      image: appimagecrafters/tests-env:debian-stable
+      command: ./AppRun
+    archlinux-latest:
+      image: appimagecrafters/tests-env:archlinux-latest
+      command: ./AppRun
+    centos-7:
+      image: appimagecrafters/tests-env:centos-7
+      command: ./AppRun
+    ubuntu-xenial:
+      image: appimagecrafters/tests-env:ubuntu-xenial
+      command: ./AppRun
+AppImage:
+  arch: x86_64
+  update-information: guess