chore: update readme

Author: zernonia

README.md

@@ -1,5 +1,5 @@
 <p align="center">
-  <a href="https://github.com/status-base/upload-file-to-supabase-storage/actions"><img alt="upload-file-to-supabase-storage status" src="https://github.com/status-base/upload-file-to-supabase-storage/workflows/build-test/badge.svg"></a>
+  <a href="https://github.com/status-base/upload-file-to-supabase-storage/actions/workflows/test.yml"><img alt="upload-file-to-supabase-storage status" src="https://github.com/status-base/upload-file-to-supabase-storage/actions/workflows/test.yml/badge.svg"></a>
 </p>
 
 # Upload file to Supabase Storage
@@ -8,20 +8,77 @@ You may want to perform some screenshot, or generate txt file and store those da
 
 ## Inputs
 
+### `file_path`
+
+Path name of the file to be uploaded.
+
+eg: "public/screenshots.png"
+
 ### `bucket`
 
-### `file_path`
+Name of the bucket to upload to
+
+eg: "screenshot"
 
 ### `content_type`
 
+[Supabase Storage](https://supabase.com/docs/reference/javascript/storage-from-upload#parameters) `from.upload` fileOptions parameter, the `Content-Type` header value.
+
+eg: "image/png"
+
 ### `cache_control`
 
+[Supabase Storage](https://supabase.com/docs/reference/javascript/storage-from-upload#parameters) `from.upload` fileOptions parameter, the `Content-Control` value.
+
+eg: "3600"
+
 ### `upsert`
 
+[Supabase Storage](https://supabase.com/docs/reference/javascript/storage-from-upload#parameters) `from.upload` fileOptions parameter, the `Upsert` value.
+
+eg: "true"
+
 ## Env
 
 ### `SUPABASE_URL`
 
+Go to [Dashboard Settings](https://app.supabase.com/project/<your-project-ref>/settings/api), copy and paste the **URL** into GitHub Repo's secret.
+
 ### `SUPABASE_ANON_KEY`
 
-WIP
+Go to [Dashboard Settings](https://app.supabase.com/project/<your-project-ref>/settings/api), copy and paste the **Anon Key** into GitHub Repo's secret.
+
+## Usage/Example
+
+In `.github/workflows/screenshot.yml`
+
+```yml
+name: Screenshot Action
+on:
+  push:
+    branches: -master
+
+env:
+  SUPABASE_URL: ${{ secrets.SUPABASE_URL }}
+  SUPABASE_ANON_KEY: ${{ secrets.SUPABASE_ANON_KEY }}
+
+jobs:
+  screenshots:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Screenshot Website
+        id: screenshot
+        uses: swinton/[email protected]
+        with:
+          source: https://github.com
+          destination: screenshot.png
+
+      - name: Upload image to Storage
+        uses: status-base/[email protected]
+        with:
+          file_path: ${{ steps.screenshot.outputs.path }}  // generated from previous step
+          bucket: website
+          content_type: image/png
+          upsert: true
+```