Merge pull request #260 from neobooru/docs-update

docs: Add apache configuration to manual install guide

INSTALL-OLD.md

@@ -169,9 +169,12 @@ In this example:
 
 - The booru is accessed from `http://example.com/`
 - The API is accessed from `http://example.com/api`
-- The API server listens locally on port 6666, and is proxied by nginx
+- The API server listens locally on port 6666, and is proxied by nginx or apache
 - The static files are served from `/srv/www/booru/client/public/data`
 
+You can use either nginx or apache to serve your static content and proxy the api server.
+Choose whichever you prefer, but don't use both.
+
 **nginx configuration**:
 
 ```nginx
@@ -194,6 +197,23 @@ server {
 }
 ```
 
+**apache configuration**:
+
+```apache
+<VirtualHost *:80>
+    ServerName example.com
+
+    Redirect 302 /api /api/
+
+    ProxyPreserveHost On
+    ProxyPass /api/ http://127.0.0.1:6666/
+    ProxyPassReverse /api/ http://127.0.0.1:6666/
+
+    DocumentRoot "/srv/www/booru/client/public"
+    FallbackResource /index.htm
+</VirtualHost>
+```
+
 **`config.yaml`**:
 
 ```yaml