chore(nestjs) add scripts directory

scripts/prepare_tests.sh

@@ -0,0 +1,8 @@
+# 1. Install all dependencies
+for D in integration/*; do [ -d "${D}" ] && npm i; done
+
+# 2. Build fresh packages and move them to sample and integration directories
+npm run build &>/dev/null
+
+# 3. Start docker containers to perform integration tests
+cd integration && docker-compose up -d

scripts/test.sh

@@ -0,0 +1,2 @@
+npm run test
+npm run integration-test