Enhance attribution for Dockerfile and firewall changes

Updated attribution section to reflect changes in firewall settings.

Author: joecorall

README.md

@@ -91,5 +91,5 @@ opencode() {
 
 ## Attribution
 
-- `Dockerfile` and `init-firewall.sh` forked from [anthropics/claude-code](https://github.com/anthropics/claude-code/tree/main/.devcontainer). Added gemini support and installed `go`
+- `Dockerfile` and `init-firewall.sh` forked from [anthropics/claude-code](https://github.com/anthropics/claude-code/tree/main/.devcontainer). Added gemini support and installed `go`. Also changed the firewall to allow access to google internal IPs
 - `download.sh` copied from [islandora-devops/isle-buildkit](https://github.com/Islandora-Devops/isle-buildkit/tree/main/base/rootfs/usr/local/bin)