services/nomad/infrastructure/nginx-mirror: add buildbot config

following upstream recommendations:
https://docs.buildbot.net/current/manual/configuration/www.html#reverse-proxy-configuration

Closes: #198 [via git-merge-pr]

services/nomad/infrastructure/nginx-mirror.nomad

@@ -62,7 +62,8 @@ job "nginx" {
           "10-mirror.conf",
           "10-proxy.conf",
           "10-sources.conf",
-          "10-wiki.conf"
+          "10-wiki.conf",
+          "10-buildbot.conf",
         ]
 
         content {

services/nomad/infrastructure/nginx-sites/10-buildbot.conf

@@ -0,0 +1,30 @@
+server {
+    include /etc/nginx/fragments/ssl.conf;
+    listen 443 ssl http2;
+    listen [::]:443 ssl http2;
+    server_name build.voidlinux.org;
+
+    proxy_set_header HOST $host;
+    proxy_set_header X-Real-IP $remote_addr;
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto $scheme;
+    proxy_set_header X-Forwarded-Server $host;
+    proxy_set_header X-Forwarded-Host $host;
+
+    location / {
+        proxy_pass http://buildbot-www.service.consul:8010/;
+    }
+
+    location /sse/ {
+        proxy_buffering off;
+        proxy_pass http://buildbot-www.service.consul:8010/sse/;
+    }
+
+    location /ws {
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection $http_connection;
+        proxy_pass http://buildbot-www.service.consul:8010/ws;
+        proxy_read_timeout 6000s;
+    }
+}