Upload attachments and include in post content

[billhanyu]

• upload files (only supporting images is fine)
• provide full paths to files to include in MarkDown
• UI for uploading and copying links

Per @Lucytheanimefan 's feature request

[billhanyu]

Not sure if I even want to provide the UI showing attachments for a single post...

[billhanyu]

Uploading files with progress bar shown & copying file path with one click 😄

[billhanyu]

However, the current impl keeps files in the file system instead of in MongoDB, so backing up the data could mean trouble...

and no I did not think of this. 😢

Solution:

1. uploading is implemented as an API, so that's good. Just need to delete the file from fs and store it in MongoDB instead in the API handler.
2. When a request comes in for the file, instead of serving the files in a static directory, use an API endpoint to retrieve from MongoDB.

[billhanyu]

Done and deployed 😆
Closing this now.