ci : fix image directory

Dockerfile

@@ -9,6 +9,7 @@ RUN python3 -u ./src/generate_cards_mvp.py
 
 FROM install-stage AS build-stage
 COPY --from=svg-stage /app/output/heron ./assets/images/cards/heron-svg
+COPY --from=svg-stage /app/img/skins ./public/img
 
 ARG NUXT_PUBLIC_ENDPOINT
 ARG NUXT_PUBLIC_DISCORD_LOGIN_ENDPOINT
@@ -19,4 +20,5 @@ RUN npx nuxi generate
 # étape de production
 FROM nginx:stable-alpine AS production-stage
 COPY --from=build-stage /app/.output/public /usr/share/nginx/html
+COPY --from=svg-stage /app/img/skins /usr/share/nginx/html/public/img/skins
 COPY ./nginx.conf /etc/nginx/conf.d/default.conf