run as non-privileged user

Dockerfile

@@ -2,5 +2,8 @@ FROM debian:stretch-slim
 
 RUN apt-get update && apt-get install --yes python-scrapy
 
+RUN useradd spider
+USER spider
+
 COPY ./ping.py /ping.py
 ENTRYPOINT ["scrapy", "runspider", "/ping.py"]

README.md

@@ -1,5 +1,5 @@
 ```sh
 sudo docker run --rm fphammerle/scrapy-ping \
     --loglevel=DEBUG \
-    -a start_url=https://ipfs.fabian.hammerle.me
+    -a start_url=https://example.hammerle.me
 ```