Merge pull request 'fix(docker): use correct Debian adduser syntax for non-interactive user creation' (#5) from develop into master

Reviewed-on: #5

Dockerfile

@@ -23,7 +23,7 @@ FROM eclipse-temurin:21-jre
 WORKDIR /app
 COPY --from=builder /app/build/libs/backend-0.0.1-SNAPSHOT.jar app.jar
 
-RUN adduser -D -g "" appuser && \
+RUN adduser --disabled-password --gecos "" appuser && \
     chown appuser:appuser /app
 USER appuser