slightly refactor sample env

sample.env

@@ -1,16 +1,16 @@
-OPENAI_TOKEN="<openai_api_token>"
-DISCORD_TOKEN="<discord_bot_token>"
-DEBUG_GUILD="974519864045756446"   #discord_server_id
-DEBUG_CHANNEL="977697652147892304"  #discord_chanel_id
-ALLOWED_GUILDS="971268468148166697,971268468148166697"
+OPENAI_TOKEN = "<openai_api_token>"
+DISCORD_TOKEN = "<discord_bot_token>"
+DEBUG_GUILD = "974519864045756446"  # discord_server_id
+DEBUG_CHANNEL = "977697652147892304"  # discord_chanel_id
+ALLOWED_GUILDS = "971268468148166697,971268468148166697"
 
 # People with the roles in ADMIN_ROLES can use admin commands like /clear-local, and etc
-ADMIN_ROLES="Admin,Owner"
+ADMIN_ROLES = "Admin,Owner"
 
 # People with the roles in DALLE_ROLES can use commands like /dalle draw or /dalle imgoptimize
-DALLE_ROLES="Admin,Openai,Dalle,gpt"
+DALLE_ROLES = "Admin,Openai,Dalle,gpt"
 
 # People with the roles in GPT_ROLES can use commands like /gpt ask or /gpt converse
-GPT_ROLES="openai,gpt"
+GPT_ROLES = "openai,gpt"
 
-WELCOME_MESSAGE="Hi There! Welcome to our Discord server. We hope you'll enjoy our server and we look forward to engaging with you!" # This is a fallback message if gpt3 fails to generate a welcome message.
+WELCOME_MESSAGE = "Hi There! Welcome to our Discord server. We hope you'll enjoy our server and we look forward to engaging with you!"  # This is a fallback message if gpt3 fails to generate a welcome message.