Fix Dockerfile COPY syntax for multi-file copy

[dcasota]

Problem

While building the photon/installer Docker image, the build fails at step 23 with the error:

COPY create-image create-ova create-repo create-azure create-ostree create-cherrypicks-repo create-pkg poi-pkglist yjson /usr/bin
When using COPY with more than one source file, the destination must be a directory and end with a /

Root Cause

The docker/Dockerfile has two issues in the COPY instruction:

1. poi-pkglist yjson on one line is interpreted as a single argument with a space, but these are two separate files that should each be on their own line
2. The destination /usr/bin is missing a trailing slash, which is required by Docker when copying multiple files

Fix

• Split poi-pkglist yjson into two separate lines (poi-pkglist \ and yjson \)
• Add trailing slash to destination: /usr/bin/

Testing

After applying this fix, the Docker image builds successfully and the Photon OS ISO can be generated.

Reference

• Docker COPY documentation: https://docs.docker.com/engine/reference/builder/#copy