update some sslproxy host files to use variables. This will allow nginx to start even if the upstream is not ready

dockerfiles/services/sslproxy/hosts/fs.xai-corp.net.conf

@@ -0,0 +1,25 @@
+# fs.xai-corp.net
+upstream fs_upstream {
+   server dkhost.xai-corp.net:8081;
+#    server dkhost.xai-corp.net:8084   backup;
+}
+
+server {
+    # this is the internal Docker DNS, cache only for 30s
+    resolver 127.0.0.11 valid=30s;
+
+    set $backend http://dkhost.xai-corp.net:8081;
+
+    listen  443 ssl ipv6only=off;
+    server_name fs.xai-corp.net;
+    ssl_certificate     /etc/letsencrypt/live/xai-corp.net/fullchain.pem;
+    ssl_certificate_key /etc/letsencrypt/live/xai-corp.net/privkey.pem;
+
+    #Strict-Transport-Security: max-age=15768000
+    add_header Strict-Transport-Security "max-age=15768000; includeSubDomains" always;
+
+    location / {
+        proxy_pass $backend;
+    }
+
+}