fix: use exec in entrypoint scripts to fix signal handling (#1943)

aio/entrypoint.sh

@@ -135,4 +135,4 @@ check_vars
 
 echo "===> Starting LocalAI[$PROFILE] with the following models: $MODELS"
 
-/build/entrypoint.sh "$@"
+exec /build/entrypoint.sh "$@"

entrypoint.sh

@@ -47,4 +47,4 @@ else
 	echo "@@@@@"
 fi
 
-./local-ai "$@"
+exec ./local-ai "$@"