feat: add miyouqian reverse proxy

conf.d/miyouqian.conf.template

@@ -0,0 +1,16 @@
+upstream miyouqian_backend {
+    zone miyouqian_backend 64k;
+    server miyouqian:5890 resolve;
+}
+
+server {
+    include snippets/https.conf;
+
+    server_name miyouqian.${BASE_DOMAIN};
+
+    include snippets/proxy.conf;
+
+    location / {
+        proxy_pass http://miyouqian_backend;
+    }
+}