build: ensure mkdir doesn't fail

Dockerfile

@@ -25,7 +25,7 @@ COPY . .
 VOLUME ["/app"]
 
 RUN adduser --home /app --no-create-home --system --uid ${AURA_UID} --group app
-RUN mkdir /app/logs
+RUN mkdir -p /app/logs
 RUN chown -R app:app /app
 
 USER app