Add test helper script to generate a selfsigned cert

src/routes/test/create_test_certificate.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+set -eu -o pipefail
+
+CRT="/tmp/test.crt";
+KEY="/tmp/test.key";
+CSR="/tmp/test.csr";
+
+openssl genrsa 2048 > $KEY
+openssl req -new -key $KEY -out $CSR -subj "/C=DE/ST=Berlin/L=Berlin/O=Cloudron/OU=Dev/CN=test.cloudron.io"
+openssl x509 -req -days 365 -in $CSR -signkey $KEY -out $CRT