chore: Minor containerfile cleanup

Containerfile

@@ -31,8 +31,7 @@ RUN git clone https://github.com/89luca89/distrobox.git --single-branch /tmp/dis
     cp /tmp/distrobox/distrobox-host-exec /usr/bin/distrobox-host-exec && \
     ln -s /usr/bin/distrobox-host-exec /usr/bin/flatpak && \
     ln -s /usr/bin/distrobox-host-exec /usr/bin/firefox && \
-    wget https://github.com/1player/host-spawn/releases/download/$(cat /tmp/distrobox/distrobox-host-exec | grep host_spawn_version= | cut -d "\"" -f 2)/host-spawn-$(uname -m) -O /tmp/distrobox/host-spawn && \
-    cp /tmp/distrobox/host-spawn /usr/bin/host-spawn && \
+    wget https://github.com/1player/host-spawn/releases/download/$(cat /tmp/distrobox/distrobox-host-exec | grep host_spawn_version= | cut -d "\"" -f 2)/host-spawn-$(uname -m) -O /usr/bin/host-spawn && \
     chmod +x /usr/bin/host-spawn && \
     rm -drf /tmp/distrobox