chore(docker): remove directives for existing user

Dockerfile

@@ -22,12 +22,8 @@ FROM node:18.18.2-bullseye-slim
 ENV NODE_ENV production
 COPY --from=build /usr/bin/dumb-init /usr/bin/dumb-init
 
-# Create a system group named "node" with the -r flag
-# Create a system user named "node" and add it to the "node" group with the -r and -g flags
 # Create a directory for the lockfile and change the ownership of the directory to the "node" user and group
-RUN groupadd -r node \
-  && useradd -r -g node node \
-  && mkdir /lockfiledir \
+RUN mkdir /lockfiledir \
   && chown -R node:node /lockfiledir
 
 WORKDIR /usr/src/app