4.0.0 org.springframework.boot spring-boot-starter-parent 4.1.1 com.ankurm system-design-url-shortener 1.0.0 system-design-url-shortener System design interview: a URL shortener with base62 ids, Redis cache-aside and a Redis token bucket 21 org.springframework.boot spring-boot-starter-webmvc org.springframework.boot spring-boot-starter-jdbc org.springframework.boot spring-boot-starter-data-redis org.postgresql postgresql runtime org.springframework.boot spring-boot-starter-test test com.h2database h2 test org.springframework.boot spring-boot-maven-plugin