chore(deps): update nginx:alpine docker digest to 74175cf (#296)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Dockerfile

@@ -41,7 +41,7 @@ RUN SECRET_KEY=dummy \
     python3 manage.py collectstatic --noinput
 
 # runtime nginx image
-FROM nginx:alpine@sha256:2140dad235c130ac861018a4e13a6bc8aea3a35f3a40e20c1b060d51a7efd250 AS runtime-nginx
+FROM nginx:alpine@sha256:74175cf34632e88c6cfe206897cbfe2d2fecf9bf033c40e7f9775a3689e8adc7 AS runtime-nginx
 
 COPY --from=builder /app/src/static_built /var/www/html/static
 COPY ./nginx/nginx.conf /etc/nginx/conf.d/default.conf