fix: update Dockerfile to use Node.js 20 Alpine and correct commit SHA in .env.local; enhance nightly and release workflows with Docker Hub description and caching improvements

next.config.mjs

@@ -5,6 +5,10 @@ const nextConfig = {
       {
         protocol: "https",
         hostname: "**",
+      },
+      {
+        protocol: "http",
+        hostname: "**",
       }
     ],
   },