separate and improve conversation agent

run.sh

@@ -5,13 +5,17 @@ source .venv/bin/activate
 if [ -f .env ]; then
   source .env
   export REPLICATE_API_TOKEN
+else
+  echo "No .env file found."
+  echo "Write a .env file with the variables: REPLICATE_API_TOKEN"
 fi
 
 case "$1" in
   "")
-    mkdir -p local-data
+    data_dir=$(realpath ./local-data)
+    mkdir -p $data_dir
     cd backend
-    python app.py ../test-data
+    python app.py $data_dir
     ;;
   "cli")
     node cli/main.js "$2"
@@ -60,8 +64,7 @@ case "$1" in
     ;;
   *)
     if [ -d "$1" ]; then
-      data_dir=../$1
-      mkdir -p local-data
+      data_dir=$(realpath $1)
       cd backend
       python app.py $data_dir
     else