Bump the all-docker group across 1 directory with 2 updates

Bumps the all-docker group with 2 updates in the / directory: ubuntu and nginx.


Updates `ubuntu` from 24.04 to 26.04

Updates `nginx` from 1.29 to 1.31

---
updated-dependencies:
- dependency-name: nginx
  dependency-version: '1.31'
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: all-docker
- dependency-name: ubuntu
  dependency-version: '26.04'
  dependency-type: direct:production
  dependency-group: all-docker
...

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

Author: dependabot[bot]

Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:24.04 AS build
+FROM ubuntu:26.04 AS build
 
 LABEL maintainer="SDF Ops Team <ops@stellar.org>"
 
@@ -32,7 +32,7 @@ ENV NODE_OPTIONS="--max-old-space-size=4096"
 #   fi
 RUN yarn build --no-minify
 
-FROM nginx:1.29
+FROM nginx:1.31
 
 COPY --from=build /app/build/ /usr/share/nginx/html/
 COPY nginx /etc/nginx/