Add nginx basic auth via docker-compose environment variables

Credentials set via AUTH_USER / AUTH_PASS in docker-compose.yml.
Entrypoint generates htpasswd at container start using openssl.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Dockerfile

@@ -6,4 +6,8 @@ RUN git submodule update --init --recursive && \
 
 FROM nginx:alpine
 COPY --from=builder /src/public /usr/share/nginx/html
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+COPY docker-entrypoint.sh /docker-entrypoint.sh
+RUN chmod +x /docker-entrypoint.sh
 EXPOSE 80
+ENTRYPOINT ["/docker-entrypoint.sh"]