Route .json and .png requests to Clojure app

docker/nginx/asciinema.conf

@@ -2,6 +2,10 @@ upstream rails-server {
     server 127.0.0.1:3000 fail_timeout=0;
 }
 
+upstream clj-server {
+    server 127.0.0.1:4000 fail_timeout=0;
+}
+
 server {
     listen 80 default_server;
     listen [::]:80 default_server;
@@ -12,6 +16,10 @@ server {
 
     client_max_body_size 16m;
 
+    location ~ ^/a/[^.]+\.(json|png)$ {
+        try_files $uri $uri/index.html $uri.html @clj;
+    }
+
     location / {
         try_files $uri $uri/index.html $uri.html @rails;
     }
@@ -33,4 +41,13 @@ server {
         proxy_redirect off;
         error_page 500 502 504 /500.html; # Rails error pages
     }
+
+    location @clj {
+        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 Host $http_host;
+        proxy_pass http://clj-server;
+        proxy_redirect off;
+    }
 }