feat: use .env for running tests

Author: humble-barnacle001

.gitignore

@@ -1,4 +1,7 @@
 # Don't accidentally allow users to commit changes in test_config.js, since it
 # may contain sensitive keys. Users who want to change this file, e.g. add a new
 # workflow parameter, should explicitly run `git add -f src/test_config.js`.
-src/test_config.js
+# src/test_config.js
+node_modules/*
+*gitpod*
+.env