chore(deps): update nginx:stable-alpine docker digest to 3c31c41

Author: renovate[bot]

frontend-project/Dockerfile

@@ -8,7 +8,7 @@ FROM env AS builder
 COPY ./ /code
 RUN yarn && yarn build
 
-FROM nginx:stable-alpine@sha256:ff557e536e5c697c5a28db13ab81bdf9b0c6a20161aa0a46419b9b251872c7df AS prod
+FROM nginx:stable-alpine@sha256:3c31c419a77edc09feae083e43e661ee54da9eed02b93be01bc5521ddc03d145 AS prod
 COPY ./nginx.conf /etc/nginx/conf.d/default.conf
 COPY --from=builder /code/dist /usr/share/nginx/html
 EXPOSE 8000