Update .htaccess for better security and caching

public/.htaccess

@@ -5,6 +5,9 @@
 # Sets the environment that CodeIgniter runs under.
 # SetEnv CI_ENVIRONMENT development
 
+# Disable directory browsing
+Options All -Indexes
+
 # ----------------------------------------------------------------------
 # UTF-8 encoding
 # ----------------------------------------------------------------------
@@ -17,6 +20,16 @@ AddDefaultCharset utf-8
     AddCharset utf-8 .atom .css .js .json .rss .vtt .xml
 </IfModule>
 
+# ----------------------------------------------------------------------
+# Activate CORS
+# ----------------------------------------------------------------------
+
+<IfModule mod_headers.c>
+    <FilesMatch "\.(ttf|ttc|otf|eot|woff|woff2|font.css|css|js|gif|png|jpe?g|svg|svgz|ico|webp)$">
+        Header set Access-Control-Allow-Origin "*"
+    </FilesMatch>
+</IfModule>
+
 # ----------------------------------------------------------------------
 # Rewrite engine
 # ----------------------------------------------------------------------
@@ -47,6 +60,12 @@ AddDefaultCharset utf-8
 	RewriteCond %{REQUEST_FILENAME} !-d
 	RewriteRule ^(.*)$ index.php/$1 [L]
 
+    # Disable image hotlinkiing start
+    RewriteCond %{HTTP_REFERER} !^$
+    RewriteCond %{HTTP_REFERER} !^http(s)?://(www\.)?example.com [NC]
+    RewriteRule \.(jpg|jpeg|png|gif)$ – [NC,F,L]
+    # Disable image hotlinkiing end
+
 	# Ensure Authorization header is passed along
     RewriteCond %{HTTP:Authorization} .
     RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
@@ -58,10 +77,58 @@ AddDefaultCharset utf-8
     ErrorDocument 404 index.php
 </IfModule>
 
+# Disable server signature start
+    ServerSignature Off
+# Disable server signature end
+
+# BEGIN Expires
+<ifModule mod_expires.c>
+	ExpiresActive On
+    ExpiresByType text/css "access 1 month"
+    ExpiresByType text/html "access 1 month"
+    ExpiresByType image/gif "access 1 year"
+    ExpiresByType image/png "access 1 year"
+    ExpiresByType image/jpg "access 1 year"
+    ExpiresByType image/jpeg "access 1 year"
+    ExpiresByType image/x-icon "access 1 year"
+    ExpiresByType image/svg+xml "access plus 1 month"
+    ExpiresByType audio/ogg "access plus 1 year"
+    ExpiresByType video/mp4 "access plus 1 year"
+    ExpiresByType video/ogg "access plus 1 year"
+    ExpiresByType video/webm "access plus 1 year"
+    ExpiresByType application/atom+xml "access plus 1 hour"
+    ExpiresByType application/rss+xml "access plus 1 hour"
+    ExpiresByType application/pdf "access 1 month"
+    ExpiresByType application/javascript "access 1 month"
+    ExpiresByType text/x-javascript "access 1 month"
+    ExpiresByType text/x-component "access plus 1 month"
+    ExpiresByType application/x-shockwave-flash "access 1 month"
+    ExpiresByType font/opentype "access plus 1 month"
+    ExpiresByType application/vnd.ms-fontobject "access plus 1 month"
+    ExpiresByType application/x-font-ttf "access plus 1 month"
+    ExpiresByType application/font-woff "access plus 1 month"
+    ExpiresByType application/font-woff2 "access plus 1 month"
+    ExpiresDefault "access 1 month"
+</ifModule>
+# END Expires
+
 # ----------------------------------------------------------------------
 # Gzip compression
 # ----------------------------------------------------------------------
 
+# Start gzip compression
+<IfModule mod_gzip.c>
+    mod_gzip_on Yes
+    mod_gzip_dechunk Yes
+    mod_gzip_item_include file \.(html?|txt|css|js|php|pl)$
+    mod_gzip_item_include handler ^cgi-script$
+    mod_gzip_item_include mime ^text/.*
+    mod_gzip_item_include mime ^application/x-javascript.*
+    mod_gzip_item_exclude mime ^image/.*
+    mod_gzip_item_exclude rspheader ^Content-Encoding:.*gzip.*
+</IfModule>
+# End gzip compression
+
 <IfModule mod_deflate.c>
 
 	# Force deflate for mangled headers developer.yahoo.com/blogs/ydn/posts/2010/12/pushing-beyond-gzipping/
@@ -85,13 +152,31 @@ AddDefaultCharset utf-8
 		                              application/x-font-ttf \
 		                              application/xhtml+xml \
 		                              application/xml \
+		                              application/x-javascript \
+                                      application/x-font \
+                                      application/x-font-truetype \
+                                      application/x-font-otf \
+                                      application/x-font-woff \
+                                      application/x-font-woff2 \
+                                      application/x-font-opentype \
 		                              font/opentype \
-		                              image/svg+xml \
+		                              font/ttf \
+                                      font/otf \
+                                      font/eot \
+                                      font/woff \
+                                      font/woff2 \
+		                              image/svg+xml svg svgz \
 		                              image/x-icon \
 		                              text/css \
 		                              text/html \
 		                              text/plain \
 		                              text/x-component \
-		                              text/xml
+		                              text/xml \
+		                              text/javascript \
+
+          # For Olders Browsers Which Can't Handle Compression
+            BrowserMatch ^Mozilla/4 gzip-only-text/html
+            BrowserMatch ^Mozilla/4\.0[678] no-gzip
+            BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
     </IfModule>
 </IfModule>