Set default character set on server to utf8mb4

Fixes #235 * Not just utf8, as per https://dev.mysql.com/doc/refman/5.5/en/charset-unicode-utf8mb4.html
epfl-si · Feb 15, 2018 · 033347d · 033347d
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commit 033347d
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diff --git a/docker-compose.yml b/docker-compose.yml
@@ -8,6 +8,7 @@ services:
       - MYSQL_ROOT_PASSWORD=${MYSQL_ROOT_PASSWORD}
     volumes:
       - ./volumes/db:/var/lib/mysql
+      - ./mysql-conf.d:/etc/mysql/conf.d:ro
 
   phpmyadmin:
       image: phpmyadmin/phpmyadmin

diff --git a/mysql-conf.d/utf8.cnf b/mysql-conf.d/utf8.cnf
@@ -0,0 +1,10 @@
+[mysqld]
+
+# https://dev.mysql.com/doc/refman/5.5/en/charset-unicode-utf8mb4.html
+# says: "The character set named utf8 uses a maximum of three bytes
+# per character and contains only BMP characters."
+# If you want emoji (which your users most probably do), you need to
+# use utf8mb4 instead.
+
+character-set-server=utf8mb4
+collation-server=utf8mb4_unicode_ci