add specific user

Dockerfile

@@ -18,7 +18,8 @@ RUN export DEBIAN_FRONTEND="noninteractive" && \
            "/var/cache/"* \
            "/var/lib/apt/lists/"* \
            "/var/log/"{apt/*,dpkg.log} \
-           "/tmp/"*
+           "/tmp/"* && \
+    useradd "calibre"
 
 # TODO: ne pas faire tourner en root si possible
 
@@ -28,4 +29,6 @@ ADD "https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini" "/t
 RUN chmod +x "/tini"
 ENTRYPOINT ["/tini", "--"]
 
+USER "calibre"
+
 CMD [ "bash", "-c", "xvfb-run calibredb add --recurse --one-book-per-directory --library-path /export/ /ebooks/*/" ]