[New] Snap build

snap/gui/rocketchat-desktop.desktop

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+[Desktop Entry]
+Name=Rocket.Chat+
+Comment=Rocket.Chat Native Cross-Platform Desktop Application via Electron.
+Exec=rocketchat-desktop
+Terminal=false
+Type=Application
+Icon=${SNAP}/meta/gui/icon.png
+Categories=GNOME;GTK;Network;InstantMessaging
+StartupWMClass=Rocket.Chat+

snap/snapcraft.yaml

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+name: rocketchat-desktop
+version: 2.8.0-develop
+summary: Rocket.Chat+
+description: Rocket.Chat Native Cross-Platform Desktop Application via Electron.
+confinement: strict
+grade: stable
+icon: snap/gui/icon.png
+apps:
+  rocketchat-desktop:
+    command: env TMPDIR=$XDG_RUNTIME_DIR desktop-launch $SNAP/rocketchat-desktop
+    plugs:
+      - home
+      - x11
+      - unity7
+      - browser-support
+      - network
+      - gsettings
+      - pulseaudio
+      - opengl
+parts:
+  app:
+    plugin: dump
+    stage-packages:
+      - libnotify4
+      - libappindicator1
+      - libxtst6
+      - libnss3
+      - libxss1
+      - fontconfig-config
+      - gconf2
+      - libasound2
+      - pulseaudio
+    organize:
+      rocketchat: rocketchat-desktop
+    source: dist/linux-unpacked
+    after:
+      - desktop-glib-only