ops: move to forgejo-primary hosting with mirror-only codeberg/github

docs/GIT_HOSTING.md

@@ -0,0 +1,45 @@
+# Git Hosting Topology
+
+Primary host:
+
+- Forgejo (`origin`)
+
+Mirrors (push-only):
+
+- Codeberg (`mirror-codeberg`)
+- GitHub (`mirror-github`)
+
+Codeberg and GitHub are distribution mirrors only. CI/actions should run on Forgejo primary.
+
+## Configure local remotes
+
+```sh
+./scripts/git-configure-hosting.sh
+```
+
+Defaults:
+
+- `origin`: `git@forge.every.channel:every-channel/every.channel.git`
+- `mirror-codeberg`: `git@codeberg.org:every-channel/every.channel.git`
+- `mirror-github`: `git@github.com:every-channel/every.channel.git`
+
+You can override via env vars:
+
+- `EVERY_CHANNEL_PRIMARY_GIT_URL`
+- `EVERY_CHANNEL_CODEBERG_GIT_URL`
+- `EVERY_CHANNEL_GITHUB_GIT_URL`
+
+## Push mirrors
+
+```sh
+./scripts/git-push-mirrors.sh
+```
+
+## Disable actions on Codeberg mirror
+
+```sh
+EVERY_CHANNEL_FORGE_HOST=https://codeberg.org \
+EVERY_CHANNEL_FORGE_REPO=every-channel/every.channel \
+EVERY_CHANNEL_FORGE_ACTIONS_ENABLED=false \
+./scripts/forge-set-repo-actions.sh
+```