add image_name for auto build

metadata.yaml

@@ -1,10 +1,11 @@
 ---
 Category: 'docker'
 Description: 'Docker repository for bam-readcount'  # Description of why the repository exists
-Maintainers: ['[email protected]', '[email protected]']  # email address of maintainers
+Maintainers: ['[email protected]', '[email protected]','[email protected]']  # email address of maintainers
 Contributors: ['Caden Bugh', 'Mao Tian']  # Full names of contributors
 Languages: ['Dockerfile']  # programming languages used
 Tools: ['bam-readcount']  # Name of the tool(s) used in the Dockerfile
 Version: ['1.0.1']  # Tool version number
 Purpose of tool: 'a utility that counts DNA sequence reads in BAM and CRAM files.'  # Description of what this tool does
 References: 'Khanna, Ajay et al. “Bam-readcount -- rapid generation of basepair-resolution sequence metrics.” ArXiv arXiv:2107.12817v1. 27 Jul. 2021 Preprint.'  # is the tool/dependencies published, is there a confluence page
+image_name: 'bam_readcount'