set token_dict 1m, add error handling of token_file missing

Author: geoffreyme

files/nginx.conf

@@ -18,7 +18,7 @@ http {
   # this is necessary for us to be able to disable request buffering in all cases
   proxy_http_version 1.1;
 
-  lua_shared_dict token_dict 5m;
+  lua_shared_dict token_dict 1m;
 
   # will run before forking out nginx worker processes
   init_by_lua_block {
@@ -29,6 +29,8 @@ http {
         local data = token_file:read()
         ngx.shared.token_dict:set("ecr_token", data)
         token_file:close()
+    else
+        ngx.log(ngx.ERR, "Failed to open token file: /usr/local/openresty/nginx/token.txt")
     end
   }