Upload: Restrict file extensions and total size of Web uploads

[lastzero]

As an Admin, I want to restrict the types of files that may be uploaded so that the web upload is safe to use.

The following additional config options have been added for this:

Environment	CLI Flag	Default	Description
PHOTOPRISM_IMPORT_ALLOW	--import-allow		restrict imports to these file types (comma-separated list of EXTENSIONS; leave blank to allow all)
PHOTOPRISM_UPLOAD_ALLOW	--upload-allow		restrict uploads to these file types (comma-separated list of EXTENSIONS; leave blank to allow all)
PHOTOPRISM_UPLOAD_ARCHIVES	--upload-archives		allow upload of zip archives (will be extracted before import)
PHOTOPRISM_UPLOAD_LIMIT	--upload-limit	1000	maximum total size of uploaded files in MB (1-100000; -1 to disable)

Note: Uploaded files that are rejected because their type is not included in PHOTOPRISM_UPLOAD_ALLOW are not added to the library and so may be lost, while PHOTOPRISM_IMPORT_ALLOW simply does not copy these file types to the originals folder without deleting them from the import folder.

[sgflt]

I am trying to test, but startup complaints about incompatible type:

Incorrect Usage: could not parse "jpg" as bool value from environment variable "PHOTOPRISM_UPLOAD_ALLOW" for flag upload-allow: strconv.ParseBool: parsing "jpg": invalid syntax

Compose setup:

      PHOTOPRISM_IMPORT_ALLOW: "jpg"
      PHOTOPRISM_UPLOAD_ALLOW: "jpg"