Add gitea service

Needed to modify the nginx configuration to allow streaming of ssh.
Using docker compose for this service, will probably migrate all others soon.

README.md

@@ -7,4 +7,7 @@ ansible-playbook -i inventory -e @secrets.enc --ask-vault-pass frontend.yaml
 
 # Github runner
 ansible-playbook -i inventory -e @secrets.enc --ask-vault-pass github-runner.yaml
+
+# gitea server
+ansible-playbook -i inventory -e @secrets.enc --ask-vault-pass gitea.yaml
 ```