Remove bashism

test/docker_install.sh

@@ -3,9 +3,6 @@
 # We need to install dependencies only for Docker
 [[ ! -e /.dockerenv ]] && [[ ! -e /.dockerinit ]] && exit 0
 
-# Where am I?
-DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
-
 set -xe
 
 # Install sqlite3
@@ -14,4 +11,4 @@ apk add --no-cache git yarn sqlite3 libsqlite3
 npm install pg sqlite3 dblite mysql2
 
 # Replace test config with docker config file
-mv "$DIR/config-ci.json" "$DIR/config.json"
+mv "./config-ci.json" "./config.json"