Fix example dockerfile

Removed double RUN, line 130
Added missing user with ID 1000

README.md

@@ -127,7 +127,7 @@ It then starts a NodeJS application from `/app`.
 ```Dockerfile
 FROM node:19-slim
 
-RUN RUN apt-get update && \
+RUN apt-get update && \
     apt-get install -y \
       bash \
       git git-lfs \
@@ -135,6 +135,8 @@ RUN RUN apt-get update && \
       htop vim nano && \
     rm -rf /var/lib/apt/lists/*
 
+RUN useradd -m -u 1000 user
+
 WORKDIR /app
 COPY --link --chown=1000 ./ /app
 RUN  npm ci