Add deno.json, rename script

deno.json

@@ -0,0 +1,7 @@
+{
+  "imports": {
+    "@db/postgres": "jsr:@db/postgres@^0.19.5",
+    "@std/crypto": "jsr:@std/crypto@^1.0.4",
+    "@std/dotenv": "jsr:@std/dotenv@^0.225.3"
+  }
+}