Add metainfo file

flatpak/com.github.qarmin.Czkawka.metainfo.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<component type="desktop-application">
+  <id>com.github.qarmin.Czkawka</id>
+  <name>Czkawka</name>
+  <summary> Multi functional app to find duplicates, empty folders, similar images etc. </summary>
+  <metadata_license>CC0-1.0</metadata_license>
+  <project_license>MIT</project_license>
+  <url type="homepage">https://github.com/qarmin/czkawka</url>
+  <description>
+    <p>
+      Czkawka is written in Rust, simple, fast and easy to use app to remove unnecessary files from your computer.
+    </p>
+  </description>
+  <launchable type="desktop-id">com.github.qarmin.Czkawka.desktop</launchable>
+  <screenshots>
+    <screenshot type="default">
+      <image>https://user-images.githubusercontent.com/41945903/104711404-9cbb7400-5721-11eb-904d-9677c189f7ab.gif</image>
+    </screenshot>
+  </screenshots>
+  <releases>
+    <release version="3.3.0" date="2021-01-15"/>
+  </releases>
+  <content_rating type="oars-1.0"/>
+</component>

flatpak/com.github.qarmin.Czkawka.yaml

@@ -26,6 +26,7 @@ modules:
   - install -Dm755 ./target/release/czkawka_gui -t /app/bin/
   - install -Dm644 com.github.qarmin.czkawka.svg /app/share/icons/hicolor/scalable/apps/com.github.qarmin.czkawka.svg
   - install -Dm644 com.github.qarmin.czkawka.desktop /app/share/applications/com.github.qarmin.czkawka.desktop
+  - install -Dm644 com.github.qarmin.Czkawka.metainfo.xml /app/share/metainfo/com.github.qarmin.Czkawka.metainfo.xml
   sources:
   - type: dir
     path: "."
@@ -36,6 +37,9 @@ modules:
   - type: file
     url: https://raw.githubusercontent.com/qarmin/czkawka/master/pkgs/com.github.qarmin.czkawka.desktop
     sha256: 4326eaa98b3fa544f2bf78632d191f53ec61616cef02fa0109ebb793ed1f9047
+  - type: file
+    url: https://raw.githubusercontent.com/qarmin/czkawka/master/flatpak/com.github.qarmin.Czkawka.metainfo.xml
+    sha256: 9cbdb2c07119f69068a3c85766d49abc6bba1edbe011e5f8c525d6f8e59bea0c
   - type: git
     url: https://github.com/qarmin/czkawka.git
     tag: 2.3.0