Bump nginx from 1.25.5-alpine to 1.27.0-alpine (#79)

Bumps nginx from 1.25.5-alpine to 1.27.0-alpine.

---
updated-dependencies:
- dependency-name: nginx
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Dockerfile

@@ -1,4 +1,4 @@
-FROM nginx:1.25.5-alpine
+FROM nginx:1.27.0-alpine
 LABEL MAINTAINER="BBT Software AG <opensource@bbtsoftware.ch>"
 
 ENV CHK_DOCKER_API_VERSION v1.38