deps.edn + ring + compojure as a single executable shell script file. Inspired by https://gist.github.com/ericnormand/6bb4562c4bc578ef223182e3bb1e72c5

light.clj

#!/bin/sh
#_(

  DEPS='
  {:deps {org.clojure/clojure {:mvn/version "1.10.0"}
          ring/ring-core {:mvn/version "1.7.1"}
          ring/ring-jetty-adapter {:mvn/version "1.7.1"}
          compojure {:mvn/version "1.6.1"}}}
  '

  exec clojure -Sdeps "$DEPS" "$0" "$@"

)

(require '[compojure.core :refer [routes GET]]
         '[compojure.route :as route]
         '[ring.adapter.jetty :refer [run-jetty]])

(def handler
  (routes
    (GET "/" [] "<h1>Hello World 1</h1>")
    (route/not-found "<h1>Page not found</h1>")))

(run-jetty handler {:port 3000})