provide the correct .env already for docker compose build

server/install/install.sh

@@ -59,6 +59,12 @@ if [[ ! -d "$PWD/$DB_DIR" ]]; then
   mkdir "$PWD/$DB_DIR"
 fi
 
+if [ -f "$INSTALL_DIR/.env" ]; then
+  cp "$INSTALL_DIR/.env" ./
+else 
+  cp "$TMPFOLDER/server/.env.default" ./.env
+fi
+
 docker compose -f server.docker-compose.yml build
 
 echo "[INSTALL] Installing server application"