Multiple changes:

- Stop ignoring static index file
- Automatically pull flutter artifacts from Launchpad
- Allow nginx to list files in directories

charmcraft.yaml

@@ -26,4 +26,15 @@ parts:
     source: .
     build-snaps:
       - astral-uv
-
+  
+  flutter-3.38.9:
+    plugin: nil
+    build-packages:
+      - curl
+    override-pull: |
+      curl -L -O https://code.launchpad.net/~vhaudiquet/+git/flutter/+artifact/436865/+files/flutter-artifacts-riscv64.tar.gz
+    override-build: |
+      tar -C $CRAFT_PART_SRC -xzf flutter-artifacts-riscv64.tar.gz
+    override-prime: |
+      mkdir -p $CRAFT_PRIME/src/static/flutter_infra_release/flutter/587c18f873b8ab57330422bce09047420d9c7f42/
+      mv $CRAFT_PART_SRC/output/* $CRAFT_PRIME/src/static/flutter_infra_release/flutter/587c18f873b8ab57330422bce09047420d9c7f42/