Serve empty error pages as text/plain not application/x-empty.

So Firefox and Chromium serve a blank page resp. a generic ”HTTP ERROR
404” page.  With application/x-empty Chromium serves the following

    This site can’t be reached

    The webpage at https://example.net/… might be temporarily down or it
    may have moved permanently to a new web address.

    ERR_INVALID_RESPONSE

which can be confusing (even though only OpenLayer should consume those
error pages).

This reverts commit 1843371641f5b3898893df91094412eaeedc8807.

1 files changed, 2 insertions, 3 deletions

diff --git a/files/etc/nginx/sites-available/webmap b/files/etc/nginx/sites-available/webmap
index e5da0be..57368cb 100644
--- a/files/etc/nginx/sites-available/webmap
+++ b/files/etc/nginx/sites-available/webmap
@@ -73,7 +73,7 @@ server {
         brotli_static on;
         try_files $uri =404;
         # service an empty payload to save bandwidth
-        error_page 404 /_empty;
+        error_page 404 /_.txt;
     }
     location = /tiles/metadata.json {
         expires epoch;
@@ -81,12 +81,11 @@ server {
         try_files $uri =404;
     }
 
-    location = /_empty {
+    location = /_.txt {
         # cache 404 responses for 8h like for valid tiles
         add_header Strict-Transport-Security "max-age=31557600; includeSubDomains" always;
         add_header Cache-Control "public; max-age=28800" always;
         #add_header Access-Control-Allow-Origin "*" always;
-        default_type application/x-empty;
         internal;
     }