Wire up Drizzle (MySQL), Redis, and Swagger docs for coursework

.env.example

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+# Already set in your Coder workspace automatically - copy to .env only for
+# running outside Coder (e.g. testing locally against your own MySQL/Redis).
+MYSQL_HOST=school-mysql
+MYSQL_PORT=3306
+MYSQL_DATABASE=
+MYSQL_USER=
+MYSQL_PASSWORD=
+
+REDIS_HOST=school-redis
+REDIS_PORT=6379
+REDIS_USERNAME=
+REDIS_PASSWORD=