merge upstream changes (#25)

* Add sigxcpu76's fix to force use of light GTK theme

When using Bambu Studio with a dark themed Linux desktop, many of the dialogs appear as white text on a white background (font's correctly invert, but dialogs remain white).

@sigxcpu76 provided a workaround for this in #12 which is to tell the app to use a light GTK theme.  This change incorporates that workaround into the AppImage making the app more usable until such time as proper dark theme support can be added to Bambu Studio.

* Update Containerfile to make it Docker compatible

- Replace COPY command with Docker compatible syntax
- Rename container tag to bambu-studio-builder so as to not confuse with a container that would actually run Bambu Studio
- Add Docker alternative build method (thx @SG-R)
- Update podman syntax to remove unnecessary sudo

* Add check_available_memory_and_disk to BuildLinux.sh

* Fixes #740

Removing check for local or Remote FX virtualized RDP session. The checks below this line already verify if proper OpenGL support is present.

Co-authored-by: deftdawg <deftdawg@gmail.com>
Co-authored-by: hifihedgehog <16614343+hifihedgehog@users.noreply.github.com>

src/platform/unix/BuildLinuxImage.sh.in

@@ -43,6 +43,8 @@ export LD_LIBRARY_PATH="\$DIR/bin"
 # 1) BambuStudio will segfault on systems where locale info is not as expected (i.e. Holo-ISO arch-based distro)
 # 2) BambuStudio will segfault with a boost logging error if ~/.config/BambuStudio doesn't exist on first run
 export LC_ALL=C
+# FIXME: BambuStudio doesn't respect dark mode; use GTK_THEME workaround from sigxcpu76                                      │
+export GTK_THEME=Adwaita:light
 mkdir -p \${HOME}/.config/BambuStudio/ 2> /dev/null
 
 exec "\$DIR/bin/@SLIC3R_APP_CMD@" "\$@"