Pre-compressed content usage config files

Closes #231

h5bp/web_performance/compression.conf

@@ -63,9 +63,3 @@ gzip_types
   text/vtt
   text/x-component
   text/x-cross-domain-policy;
-
-# This should be turned on if you are going to have pre-compressed copies (.gz)
-# of static files available. If not it should be left off as it will cause extra
-# I/O for the check. It is best if you enable this in a `location` block for a
-# specific directory, or on an individual `server` level.
-# gzip_static on;

h5bp/web_performance/pre-compressed_content_brotli.conf

@@ -0,0 +1,17 @@
+# ----------------------------------------------------------------------
+# | Brotli pre-compressed content                                      |
+# ----------------------------------------------------------------------
+
+# Serve brotli compressed files if they exist and if the client accepts brotli
+# encoding.
+#
+# (!) To make this part relevant, you need to generate encoded files by your
+#     own. Enabling this part will not auto-generate brotlied files.
+#
+# Note that some clients (eg. browsers) require a secure connection to request
+# brotli-compressed resources.
+# https://www.chromestatus.com/feature/5420797577396224
+#
+# https://github.com/eustas/ngx_brotli/#brotli_static
+
+brotli_static on;

h5bp/web_performance/pre-compressed_content_gzip.conf

@@ -0,0 +1,13 @@
+# ----------------------------------------------------------------------
+# | GZip pre-compressed content                                        |
+# ----------------------------------------------------------------------
+
+# Serve gzip compressed files if they exist and if the client accepts gzip
+# encoding.
+#
+# (!) To make this part relevant, you need to generate encoded files by your
+#     own. Enabling this part will not auto-generate gziped files.
+#
+# https://nginx.org/en/docs/http/ngx_http_gzip_static_module.html
+
+gzip_static on;

test/vhosts/server.localhost.conf

@@ -25,6 +25,6 @@ server {
   include h5bp/errors/custom_errors.conf;
 
   location ~* /test-pre-gzip {
-    gzip_static on;
+    include h5bp/web_performance/pre-compressed_content_gzip.conf;
   }
 }