ensure data directory is present in the repo

to ease running the app on checkout and in CI

.gitignore

@@ -17,5 +17,3 @@
 /unknown/
 /lib/fonts/
 
-# for data/
-/data

data/.gitignore

@@ -0,0 +1,4 @@
+# Ignore everything in this directory
+*
+# Except this file
+!.gitignore

tests/run.sh

@@ -3,6 +3,7 @@ set -ex
 python3 -m venv testEnv
 source ./testEnv/bin/activate
 pip install locust
+mkdir -p data/
 java -jar target/scala-2.13/LibreCaptcha.jar &
 JAVA_PID=$!
 sleep 4