Add additional key pattern

to construct S3 keys for images

cfg/commons/commons-static.env

@@ -19,6 +19,7 @@ EXPORT_KEY_PATTERN_ENDNOTE="citation/%s/%s_%s.enw"
 EXPORT_KEY_PATTERN_IIIF="iiif/%s.json"
 EXPORT_KEY_PATTERN_IIIF_RANGE="iiif/%s/range/%s.json"
 EXPORT_KEY_PATTERN_INFO_JSON="info/%s/%s.json" 
+EXPORT_KEY_PATTERN_IMAGE="orig/%s/%s." 
 
 # orig/<work_id>/<page>.{jpg | tif | gif | ...}
 S3_IMAGE_KEY_PATTERN=orig/%s/%s.%s

indexer/util/config.go

@@ -134,6 +134,7 @@ type Config struct {
 	ExportKeyPatternIiif      string `mapstructure:"EXPORT_KEY_PATTERN_IIIF"`
 	ExportKeyPatternIiifRange string `mapstructure:"EXPORT_KEY_PATTERN_IIIF_RANGE"`
 	ExportKeyPatternInfoJson  string `mapstructure:"EXPORT_KEY_PATTERN_INFO_JSON"`
+	ExportKeyPatternImage     string `mapstructure:"EXPORT_KEY_PATTERN_IMAGE"`
 
 	// HTTP connection settings
 	HttpClientTimeout                 int `mapstructure:"HTTP_CLIENT_TIMEOUT"`