Update nginxinc/nginx-unprivileged:alpine-slim Docker digest to ef0100e (#30273)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Dockerfile

@@ -19,7 +19,7 @@ RUN /src/scripts/docker-package.sh
 RUN cp /src/config.sample.json /src/webapp/config.json
 
 # App
-FROM nginxinc/nginx-unprivileged:alpine-slim@sha256:ec6b8b1f1bfa594db13e99fc692b9fb816cb7e365927196610f622659de95913
+FROM nginxinc/nginx-unprivileged:alpine-slim@sha256:ef0100e39ffe377a42ad99e1f644b78097a84f1ac60a90eac3b888196b2eeb00
 
 # Need root user to install packages & manipulate the usr directory
 USER root