Update packages in alpine image

[digitalghost-dev]

In the main Dockerfile using alpine3.22, there are two packages that have had their vulnerabilities fixed:

NAME             INSTALLED   FIXED IN  TYPE       VULNERABILITY        SEVERITY  EPSS %  RISK
libcrypto3       3.5.0-r0    3.5.1-r0  apk        CVE-2025-4575        Medium    6.43    < 0.1
libssl3          3.5.0-r0    3.5.1-r0  apk        CVE-2025-4575        Medium    6.43    < 0.1

Adding a RUN apk upgrade && \ to the build stage of the Dockerfile updates these since the alpine image hasn't been updated yet.