Chore: Add S3 bucket policy (#746)

docs/development/project-setup/storage/s3-bucket.md

@@ -0,0 +1,60 @@
+---
+path: "/docs/configuring-s3-bucket-as-cloud-storage"
+title: "Configuring Cloud Storage"
+---
+
+### Using Amazon S3
+
+You can get started with [Creating an S3 bucket](https://docs.aws.amazon.com/AmazonS3/latest/gsg/CreatingABucket.html) and [Create an IAM user](https://docs.aws.amazon.com/IAM/latest/UserGuide/id_users_create.html) to configure the following details.
+
+Configure the following env variables.
+
+```bash
+ACTIVE_STORAGE_SERVICE='amazon'
+S3_BUCKET_NAME=
+AWS_ACCESS_KEY_ID=
+AWS_SECRET_ACCESS_KEY=
+AWS_REGION=
+```
+
+### S3 Bucket policy
+
+Inorder to use S3 bucket in Chatwoot, a policy has to be set with the correct credentials. A sample policy is given below, as the listed actions are required for the storage to work.
+
+```json
+{
+    "Version": "2012-10-17",
+    "Id": "Policyxxx",
+    "Statement": [
+        {
+            "Sid": "Stmtxxx",
+            "Effect": "Allow",
+            "Principal": {
+                "AWS": "your-user-arn"
+            },
+            "Action": [
+                "s3:DeleteObject",
+                "s3:GetObject",
+                "s3:ListBucket",
+                "s3:PutObject"
+            ],
+            "Resource": [
+                "arn:aws:s3:::your-bucket-name",
+                "arn:aws:s3:::your-bucket-name/*"
+            ]
+        }
+    ]
+}
+```
+
+Replace your *bucket name* in the appropriate places.
+
+**User ARN** can be found using the following steps:
+
+1. Login to AWS Console. Go to IAM, and click on Users from the left sidebar. You will be to see the list of users as follows.
+
+![s3-users-list](./images/s3-users-list.png)
+
+2. Click on the user, you will be to see a screen as shown below. Copy the User ARN and paste it in the above policy.
+
+![user-arn](./images/user-arn.png)