Initialize Spring Boot backend with JWT auth

src/main/resources/application.properties

@@ -0,0 +1,9 @@
+spring.datasource.url=${MYSQL_URL:jdbc:mysql://localhost:3306/openisle}
+spring.datasource.username=${MYSQL_USER:root}
+spring.datasource.password=${MYSQL_PASSWORD:password}
+spring.jpa.hibernate.ddl-auto=update
+
+resend.api.key=${RESEND_API_KEY:}
+
+app.jwt.secret=${JWT_SECRET:ChangeThisSecretKeyForJwt}
+app.jwt.expiration=${JWT_EXPIRATION:86400000}