fix: too many vulnerabilities - Trigger new build

[mmornati]

Problem

The latest built (and available) image is having a lot of vulnerabilities (related to the May NGINX image).

Fix

As the Dockerfile is using the latest nginx:alpine (latest at the build time), simply triggering a new build (and creating a new version) will fix most of the vulns.

Improvements

A possible improvement (to prevent any manual operation) is to trigger a new minor image release each time nginx is releasing a new image.