[odrs-web] nginx: Enable proxy_cache for API responses

[Bartłomiej Piotrowski <bpiotrowski src gnome org>]

commit e1aaf303465a1df803fe884322c2a9458a44d4af
Author: Bartłomiej Piotrowski <bpiotrowski gnome org>
Date:   Thu Apr 28 09:43:03 2022 +0200

    nginx: Enable proxy_cache for API responses

 nginx.conf | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)
---
diff --git a/nginx.conf b/nginx.conf
index 001d6ae..f00390c 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -33,9 +33,12 @@ http {
 
     log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                       '$status $body_bytes_sent "$http_referer" '
-                      '"$http_user_agent" "$http_x_forwarded_for"';
+                      '"$http_user_agent" "$http_x_forwarded_for" $upstream_cache_status';
     access_log  /dev/stdout  main;
 
+    proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=cache:10m max_size=1g
+                     inactive=30d use_temp_path=off;
+
     server {
         listen 8000 default_server;
         listen [::]:8000 default_server;
@@ -43,6 +46,12 @@ http {
         error_log /dev/stderr;
 
         location / {
+            proxy_cache cache;
+            proxy_cache_valid 200 15m;
+            proxy_cache_use_stale error timeout updating http_500 http_502 http_503 http_504;
+            proxy_cache_lock on;
+            proxy_cache_revalidate on;
+
             proxy_pass http://odrs:8080/;
         }
     }