feat: update Dockerfile

Dockerfile

@@ -1,9 +1,15 @@
 FROM centos
 LABEL maintainer="MiaoWoo<admin@yumc.pw>"
 
-ENV LANG C.UTF-8
+ENV LANG en_US.UTF-8
+
+RUN yum install -y fontconfig git nano
+RUN git clone https://github.com/powerline/fonts.git --depth=1 && \
+        cd fonts && \
+        ./install.sh && \
+        fc-cache
+
 WORKDIR /root
-RUN yum install -y fontconfig
 
 ADD main main
 ADD lib lib