[web] Increase yarn install timeout

Workaround for the image build failing no the arm64 runners (it works fine on
the amd64 runner):
https://github.com/ente-io/ente/actions/runs/13962703146/job/39086814540

web/Dockerfile

@@ -6,6 +6,9 @@ COPY . .
 ENV NEXT_PUBLIC_ENTE_ENDPOINT=ENTE_API_ORIGIN_PLACEHOLDER
 ENV NEXT_PUBLIC_ENTE_ALBUMS_ENDPOINT=ENTE_ALBUMS_ORIGIN_PLACEHOLDER
 
+# `yarn install` is flaky on the GitHub arm64 runners otherwise.
+RUN yarn config set network-timeout 900000 -g
+
 RUN yarn install
 RUN yarn build:photos
 RUN yarn build:accounts