leverage browser caching

.htaccess

# ######################################################################
# # WEB PERFORMANCE                                                    #
# ######################################################################

# ----------------------------------------------------------------------
# | Compression                                                        |
# ----------------------------------------------------------------------

<IfModule mod_deflate.c>
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE application/javascript
AddOutputFilterByType DEFLATE application/x-javascript
AddOutputFilterByType DEFLATE image/svg+xml
</IfModule>

# ----------------------------------------------------------------------
# | Expires headers                                                    |
# ----------------------------------------------------------------------

<IfModule mod_expires.c>

ExpiresActive on
ExpiresDefault                                      "access plus 1 week"

# CSS
ExpiresByType text/css                              "access plus 1 week"

# Data interchange
ExpiresByType application/json                      "access plus 0 seconds"

# HTML
ExpiresByType text/html                             "access plus 0 seconds"

# JavaScript
ExpiresByType text/javascript                       "access plus 1 week"

# Media files
ExpiresByType image/jpeg                            "access plus 1 month"
ExpiresByType image/png                             "access plus 1 month"
ExpiresByType image/svg+xml                         "access plus 1 month"

# Web fonts

# Embedded OpenType (EOT)
ExpiresByType font/eot                              "access plus 1 year"

# OpenType
ExpiresByType font/opentype                         "access plus 1 year"

# TrueType
ExpiresByType application/x-font-ttf                "access plus 1 year"

# Web Open Font Format (WOFF) 1.0
ExpiresByType application/font-woff                 "access plus 1 year"

# Web Open Font Format (WOFF) 2.0
ExpiresByType application/font-woff2                "access plus 1 year"

</IfModule>