Fix Dockerfile typo

Dockerfile

@@ -23,9 +23,6 @@ ENV __GL_SYNC_TO_VBLANK 0
 ENV LD_LIBRARY_PATH /usr/lib/x86_64-linux-gnu:/usr/lib/i386-linux-gnu${LD_LIBRARY_PATH:+:${LD_LIBRARY_PATH}}
 # Enable AppImage execution in a container
 ENV APPIMAGE_EXTRACT_AND_RUN 1
-# Add configuration for Selkies-GStreamer Joystick interposer
-ENV LD_PRELOAD /usr/local/lib/selkies-js-interposer/joystick_interposer.so${LD_LIBRARY_PATH:+:${LD_LIBRARY_PATH}}
-ENV SDL_JOYSTICK_DEVICE /dev/input/js0
 # System defaults that should not be changed
 ENV DISPLAY :0
 ENV XDG_RUNTIME_DIR /tmp/runtime-user
@@ -473,6 +470,9 @@ RUN apt-get update && apt-get install --no-install-recommends -y \
     curl -fsSL "https://github.com/selkies-project/selkies-gstreamer/releases/download/v${SELKIES_VERSION}/selkies-gstreamer-web-v${SELKIES_VERSION}.tgz" | tar -zxf - && \
     curl -O -fsSL "https://github.com/selkies-project/selkies-gstreamer/releases/download/v${SELKIES_VERSION}/selkies-js-interposer-v${SELKIES_VERSION}-ubuntu${UBUNTU_RELEASE}.deb" && apt-get update && apt-get install --no-install-recommends -y "./selkies-js-interposer-v${SELKIES_VERSION}-ubuntu${UBUNTU_RELEASE}.deb" && rm -f "selkies-js-interposer-v${SELKIES_VERSION}-ubuntu${UBUNTU_RELEASE}.deb" && rm -rf /var/lib/apt/lists/* && \
     cd /usr/local/cuda/lib64 && sudo find . -maxdepth 1 -type l -name "*libnvrtc.so.*" -exec sh -c 'ln -snf $(basename {}) libnvrtc.so' \;
+# Add configuration for Selkies-GStreamer Joystick interposer
+ENV LD_PRELOAD /usr/local/lib/selkies-js-interposer/joystick_interposer.so${LD_PRELOAD:+:${LD_PRELOAD}}
+ENV SDL_JOYSTICK_DEVICE /dev/input/js0
 
 # Install the noVNC web interface and the latest x11vnc for fallback
 RUN apt-get update && apt-get install --no-install-recommends -y \