Switch to user build and set USER

Dockerfile

@@ -8,11 +8,13 @@ RUN apk add -U \
 		sudo \
 		git
 
-RUN groupadd -g 1000 jenkins \
- && useradd -u 1000 -g 1000 -m jenkins \
- && echo 'Defaults:jenkins !requiretty' | tee -a /etc/sudoers \
- && echo 'jenkins ALL=(ALL:ALL) NOPASSWD: ALL' | tee -a /etc/sudoers
+RUN groupadd -g 1000 build \
+ && useradd -u 1000 -g 1000 -m build \
+ && echo 'Defaults:build !requiretty' | tee -a /etc/sudoers \
+ && echo 'build ALL=(ALL:ALL) NOPASSWD: ALL' | tee -a /etc/sudoers \
+ && chown build.build /usr/local/bin
 
+USER build
 RUN git clone https://git.icinga.com/build-docker/scripts.git /usr/local/bin
 ENTRYPOINT ["/usr/local/bin/icinga-build-entrypoint"]
 CMD ["icinga-build-upload-aptly"]