Removed flash-attn as dependency because it's hard to install properly

scripts/local.sh

@@ -10,7 +10,12 @@ function chown_iterations() {
     fi
 }
 
+function clean_docker() {
+    docker images -f "dangling=true" -q | xargs -r docker rmi
+}
+
 trap chown_iterations EXIT
+trap clean_docker EXIT
 
 docker build \
     --tag sia \