Add libfontconfig to new alpine docker image

[agilliland]

Seeing this in the logs on some of our pulse renderings with the latest docker image ...

Apr 25 11:00:00 metabase-prod 79a2d479f759-stdouterr.log:  04-25 18:00:00 ERROR task.send-pulses :: Error sending pulse: 8 #error {
Apr 25 11:00:00 metabase-prod 79a2d479f759-stdouterr.log:   :cause nil
Apr 25 11:00:00 metabase-prod 79a2d479f759-stdouterr.log:   :via
Apr 25 11:00:00 metabase-prod 79a2d479f759-stdouterr.log:   [{:type java.lang.NullPointerException
Apr 25 11:00:00 metabase-prod 79a2d479f759-stdouterr.log:     :message nil
Apr 25 11:00:00 metabase-prod 79a2d479f759-stdouterr.log:     :at [sun.awt.X11FontManager getDefaultPlatformFont X11FontManager.java 779]}]
Apr 25 11:00:00 metabase-prod 79a2d479f759-stdouterr.log:   :trace
Apr 25 11:00:00 metabase-prod 79a2d479f759-stdouterr.log:   [[sun.awt.X11FontManager getDefaultPlatformFont X11FontManager.java 779]
Apr 25 11:00:00 metabase-prod 79a2d479f759-stdouterr.log:    [sun.font.SunFontManager$2 run SunFontManager.java 433]
Apr 25 11:00:00 metabase-prod 79a2d479f759-stdouterr.log:    [java.security.AccessController doPrivileged AccessController.java -2]
Apr 25 11:00:00 metabase-prod 79a2d479f759-stdouterr.log:    [sun.font.SunFontManager <init> SunFontManager.java 376]
Apr 25 11:00:00 metabase-prod 79a2d479f759-stdouterr.log:    [sun.awt.X11FontManager <init> X11FontManager.java 32]
Apr 25 11:00:00 metabase-prod 79a2d479f759-stdouterr.log:    [sun.reflect.NativeConstructorAccessorImpl newInstance0 NativeConstructorAccessorImpl.java -2]
Apr 25 11:00:00 metabase-prod 79a2d479f759-stdouterr.log:    [sun.reflect.NativeConstructorAccessorImpl newInstance NativeConstructorAccessorImpl.java 57]
Apr 25 11:00:00 metabase-prod 79a2d479f759-stdouterr.log:    [sun.reflect.DelegatingConstructorAccessorImpl newInstance DelegatingConstructorAccessorImpl.java 45]
Apr 25 11:00:00 metabase-prod 79a2d479f759-stdouterr.log:    [java.lang.reflect.Constructor newInstance Constructor.java 526]
Apr 25 11:00:00 metabase-prod 79a2d479f759-stdouterr.log:    [java.lang.Class newInstance Class.java 383]

http://mail.openjdk.java.net/pipermail/jdk7-dev/2012-November/002313.html

[agilliland]

@michaelshobbs would you be able to take a quick look at this one at some point? looks like the alpine image for Metabase is missing some font libraries.

[michaelshobbs]

How can we test this?

[agilliland]

let me try a couple things and see if i can build a reproduceable test case.