feat(apps/dump-store-s3): allow setting custom S3 endpoint

allows using a custom s3-compatible store for persisting board data

when S3_ENDPOINT is not set, defaults to AWS-specific endpoints

docs/CONFIG.md

@@ -1,4 +1,4 @@
-# Config
+
 
 Several aspects of [wuffle](https://wuffle.dev) are configured via environment variables:
 
@@ -41,6 +41,7 @@ Several aspects of [wuffle](https://wuffle.dev) are configured via environment v
 | `S3_BUCKET` |  | Name of S3 bucket to load and dump task board to |
 | `S3_REGION` |  | Region of the S3 bucket to dump to |
 | `S3_KEY` |  | Name of the file to store in the bucket; defaults to `storedump.json` |
+| `S3_ENDPOINT` |  | fully qualified domain name of the S3 compatible service you are using to persist data with; defaults to AWS S3 endpoints |
 
 
 ### Background Sync

packages/app/lib/apps/dump-store/s3/S3.js

@@ -11,11 +11,13 @@ function S3() {
     AWS_SECRET_ACCESS_KEY: secretAccessKey,
     S3_BUCKET: bucket,
     S3_REGION: region,
-    S3_KEY: key = 'storedump.json'
+    S3_KEY: key = 'storedump.json',
+    S3_ENDPOINT: endpoint
   } = process.env;
 
   const s3client = new S3Client({
     region,
+    endpoint,
     credentials: {
       accessKeyId,
       secretAccessKey
@@ -68,4 +70,4 @@ function streamToBuffer(readable) {
     readable.on('data', (data) => buffers.push(data));
     readable.on('end', () => resolve(Buffer.concat(buffers)));
   });
-}
+}