Fix docker building (#13681)

### What problem does this PR solve?

1. Refactor go server log
2. Update docker building, since nginx config should be set according to
the deployment.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

---------

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

Dockerfile

@@ -220,6 +220,13 @@ COPY docker/service_conf.yaml.template ./conf/service_conf.yaml.template
 COPY docker/entrypoint.sh ./
 RUN chmod +x ./entrypoint*.sh
 
+# Copy nginx configuration for frontend serving
+COPY docker/nginx/ragflow.conf.golang docker/nginx/ragflow.conf.python docker/nginx/ragflow.conf.hybrid docker/nginx/nginx.conf docker/nginx/proxy.conf /etc/nginx/
+RUN mv /etc/nginx/ragflow.conf.golang /etc/nginx/conf.d/ragflow.conf.golang && \
+    mv /etc/nginx/ragflow.conf.python /etc/nginx/conf.d/ragflow.conf.python && \
+    mv /etc/nginx/ragflow.conf.hybrid /etc/nginx/conf.d/ragflow.conf.hybrid && \
+    rm -f /etc/nginx/sites-enabled/default
+
 # Copy compiled web pages
 COPY --from=builder /ragflow/web/dist /ragflow/web/dist