diff --git a/react-nginx/Dockerfile b/react-nginx/Dockerfile
index a494b01..44eaf8d 100755
--- a/react-nginx/Dockerfile
+++ b/react-nginx/Dockerfile
@@ -26,16 +26,12 @@ RUN npm run build
 
 
 FROM development as dev-envs
-RUN <<EOF
-apt-get update
-apt-get install -y --no-install-recommends git
-EOF
-
-RUN <<EOF
-useradd -s /bin/bash -m vscode
-groupadd docker
+RUN apt update && \
+apt install -y --no-install-recommends git
+
+RUN useradd -s /bin/bash -m vscode && \
+groupadd docker && \
 usermod -aG docker vscode
-EOF
 # install Docker tools (cli, buildx, compose)
 COPY --from=gloursdocker/docker / /
 CMD [ "npm", "start" ]