Add RULE34_API_KEY to environment configuration and update request URL generation

src/core/configLoader.ts

@@ -1,13 +1,15 @@
 export type EnvConst = {
     ADMIN: string,
     BOT_TOKEN: string,
+    RULE34_API_KEY: string,
     // DB_LOCATION: string
 }
 
 export function loadConfig() {
     return {
         ADMIN: loadEnv("ADMIN"),
-        BOT_TOKEN: loadEnv("BOT_TOKEN"), 
+        BOT_TOKEN: loadEnv("BOT_TOKEN"),
+        RULE34_API_KEY: loadEnv("RULE34_API_KEY"),
         // DB_LOCATION: loadEnv("DB_LOCATION")
     }
 }