Update links from github.com to git.vdb.to (#732)

Update links and references to github.com to git.vdb.to.

Also enable the flake8 lint action in gitea.

Reviewed-on: cerc-io/stack-orchestrator#732
Co-authored-by: Thomas E Lackey <telackey@bozemanpass.com>
Co-committed-by: Thomas E Lackey <telackey@bozemanpass.com>

scripts/cloud-init-dev-mode-install.yaml

@@ -41,4 +41,4 @@ runcmd:
   - apt-get install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
   - systemctl enable docker
   - systemctl start docker
-  - git clone https://github.com/cerc-io/stack-orchestrator.git /home/ubuntu/stack-orchestrator
+  - git clone https://git.vdb.to/cerc-io/stack-orchestrator.git /home/ubuntu/stack-orchestrator