add read me

storagesize-bot/.env.example

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+TOKEN=YOURTOKEN

storagesize-bot/readme.md

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+# Storage size notification bot for discord
+
+## Running the bot locally
+
+- Take a copy of .env.example and add token of the bot and rename to .env
+- `npm install`
+- `nodemon`
+
+## Deploying it
+
+- Take a copy of .env.example and add token of the bot and rename to .env
+- `npm install`
+- Use pm2 or any process managers to deploy
+  - `npm install pm2@latest -g`
+    or
+    `yarn global add pm2`
+  - pm2 start ./index.js