Chat Stream Integration (#52)

* rm: axios dependency

* add: stream parsing for normal style

* fix: empty string problem

* add: stream for embedded prompts

* update: version increment

docker-compose.yml

@@ -8,7 +8,7 @@ services:
     build: ./                     # find docker file in designated path
     container_name: discord
     restart: always               # rebuild container always
-    image: discord/bot:0.4.0
+    image: discord/bot:0.4.2
     environment:
       CLIENT_TOKEN: ${CLIENT_TOKEN}
       GUILD_ID: ${GUILD_ID}