[dev] also mark /app as safe during .devcontainer/build.sh

Author: shish

.devcontainer/Dockerfile

@@ -3,7 +3,8 @@ ARG DEBIAN_FRONTEND=noninteractive
 ARG XDEBUG_MODE=coverage
 RUN apt update -y && apt install -y git composer php-cli php-dom php-curl php-xdebug vim
 WORKDIR /app
-RUN git config --global --add safe.directory /app/generator/doc/doc-en/en && \
+RUN git config --global --add safe.directory /app && \
+    git config --global --add safe.directory /app/generator/doc/doc-en/en && \
     git config --global --add safe.directory /app/generator/doc/doc-en/doc-base
 CMD cd /app/generator/doc && ./update.sh && \
     cd /app && composer install && \