[fix] container: setup minimal (#6268)

Start minimal, use defaults, and extend later on. The templates are no longer
checked for changes, which was confusing and annoying after a while.

See: https://github.com/searxng/searxng/issues/6261#issuecomment-4716008282

utils/lib_sxng_container.sh

@@ -99,8 +99,6 @@ container.build() {
             timestamp_venv="$timestamp_requirements_server"
         fi
 
-        timestamp_searx_settings=$(git log -1 --format='%ct' ./searx/settings.yml)
-
         if [ "$container_engine" = "podman" ]; then
             params_build_builder="build --format=oci --platform=$platform --layers --identity-label=false --timestamp=$timestamp_venv"
             params_build="build --format=oci --platform=$platform --layers --identity-label=false"
@@ -119,7 +117,6 @@ container.build() {
         # shellcheck disable=SC2086
         "$container_engine" $params_build_builder \
             --build-arg="TIMESTAMP_VENV=$timestamp_venv" \
-            --build-arg="TIMESTAMP_SETTINGS=$timestamp_searx_settings" \
             --tag="localhost/$CONTAINER_IMAGE_ORGANIZATION/$CONTAINER_IMAGE_NAME:builder" \
             --file="./container/builder.dockerfile" \
             .