Update env vars

Dockerfile

@@ -1,13 +1,13 @@
 FROM ghcr.io/livebook-dev/livebook:latest-cuda12.1
 
-ENV LIVEBOOK_APP_SERVICE_NAME "🐳 Hugging Face - $SPACE_TITLE"
-ENV LIVEBOOK_APP_SERVICE_URL "https://huggingface.co/spaces/$SPACE_AUTHOR_NAME/$SPACE_REPO_NAME"
-ENV LIVEBOOK_UPDATE_INSTRUCTIONS_URL "https://livebook.dev"
-ENV LIVEBOOK_WITHIN_IFRAME "true"
-ENV LIVEBOOK_APPS_PATH "/public-apps"
-ENV LIVEBOOK_APPS_PATH_WARMUP "manual"
-ENV LIVEBOOK_DATA_PATH "/data"
-ENV LIVEBOOK_PORT 7860
+ENV LIVEBOOK_APP_SERVICE_NAME="🐳 Hugging Face - $SPACE_TITLE"
+ENV LIVEBOOK_APP_SERVICE_URL="https://huggingface.co/spaces/$SPACE_AUTHOR_NAME/$SPACE_REPO_NAME"
+ENV LIVEBOOK_UPDATE_INSTRUCTIONS_URL="https://livebook.dev"
+ENV LIVEBOOK_WITHIN_IFRAME="true"
+ENV LIVEBOOK_APPS_PATH="/public-apps"
+ENV LIVEBOOK_APPS_PATH_WARMUP="manual"
+ENV LIVEBOOK_DATA_PATH="/data"
+ENV LIVEBOOK_PORT="7860"
 
 EXPOSE 7860
 
@@ -16,9 +16,13 @@ RUN chmod 777 /data
 
 # The Space container runs with user ID 1000
 RUN useradd -m -u 1000 user
-ENV HOME=/home/user
+ENV HOME="/home/user"
 
 USER user
 
+# TODO: remove this once EXLA v0.8 is out and we infer the default from the environment
+# Configure Nx/EXLA to use the GPU (also relevant for warmup_apps below)
+ENV XLA_TARGET="cuda120"
+
 COPY --chown=user public-apps/ /public-apps
 RUN /app/bin/warmup_apps