add optional S3_BUCKET

Author: juris

README.md

@@ -6,12 +6,16 @@
 
 To run this project, you will need the following environment variables
 
+**Required:**
 `GH_ORG`
 
 `GH_USER`
 
 `GH_PASS`
 
+**Optional:**
+`S3_BUCKET` - If provided, backups will be configured to use S3 storage
+
 ## Usage/Examples
 
 ```shell
@@ -21,3 +25,13 @@ docker run -v ${LOCAL_BACKUP_DIRECTORY}:/opt/scm-backup/backup \
            -e GH_ORG=org \
            juroapp/scm-backup
 ```
+
+**With S3 backup enabled:**
+```shell
+docker run -v ${LOCAL_BACKUP_DIRECTORY}:/opt/scm-backup/backup \
+           -e GH_USER=username \
+           -e GH_PASS=app_password \
+           -e GH_ORG=org \
+           -e S3_BUCKET=my-backup-bucket \
+           juroapp/scm-backup
+```

entrypoint.sh

@@ -12,6 +12,11 @@ yq e -i '
       .name = env(GH_ORG)
     | .authName = env(GH_USER)
   )
+  | if has("S3_BUCKET") then
+      .options.backup.s3BucketName = env(S3_BUCKET)
+    else
+      .
+    end
 ' settings.yml
 
 exec dotnet ScmBackup.dll