Bump nginx from 1.27.3-alpine to 1.27.4-alpine in /server

Bumps nginx from 1.27.3-alpine to 1.27.4-alpine.

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

server/Dockerfile

@@ -1,6 +1,6 @@
 FROM nginxproxy/forego:0.18.2-debian AS forego
 
-FROM nginx:1.27.3-alpine
+FROM nginx:1.27.4-alpine
 
 COPY --from=forego /usr/local/bin/forego /usr/local/bin/forego