replace shared volume between the inventaire and nginx services by a multi-stage copy

See https://docs.docker.com/build/building/multi-stage/#use-an-external-image-as-a-stage

The shared volume was making updates complicated, as the persisted volume data would not be overriden by the new container

nginx/Dockerfile.nginx

@@ -1,5 +1,8 @@
-FROM nginx
+FROM nginx:1.28
 
 RUN [ ! -f /etc/nginx/dhparam.pem ] && openssl dhparam -out /etc/nginx/dhparam.pem 2048
 
-RUN mkdir -p /tmp/nginx/tmp /tmp/nginx/resize/img/users /tmp/nginx/resize/img/groups /tmp/nginx/resize/img/entities /tmp/nginx/resize/img/remote /tmp/nginx/resize/img/assets && chown -R nginx:nginx /tmp/nginx
+RUN mkdir -p /tmp/nginx/tmp /tmp/nginx/resize/img/users /tmp/nginx/resize/img/groups /tmp/nginx/resize/img/entities /tmp/nginx/resize/img/remote /tmp/nginx/resize/img/assets /var/cache/nginx/client_temp /opt/inventaire/client && chown -R nginx:nginx /tmp/nginx /opt
+
+# See https://docs.docker.com/build/building/multi-stage/
+COPY --from=inventaire/inventaire:latest /opt/inventaire/client /opt/inventaire/client