Initial commit

Signed-off-by: mikesir87 <mikesir87@gmail.com>

Imported from dockersamples/101-tutorial, removed other languages
for now, and replaced PWD references with Docker Desktop.

app/src/persistence/index.js

@@ -0,0 +1,2 @@
+if (process.env.MYSQL_HOST) module.exports = require('./mysql');
+else module.exports = require('./sqlite');