feat: Add runners

Signed-off-by: Julien Riou <julien@riou.xyz>

templates/runners/docker-compose.yml.j2

@@ -0,0 +1,36 @@
+---
+{{ ansible_managed | comment }}
+services:
+  docker:
+    container_name: forgejo-docker
+    image: docker:dind
+    privileged: true
+    volumes:
+      - certs:/certs
+    networks:
+      - forgejo
+
+{% for runner in forgejo_runners %}
+  runner-{{ runner }}:
+    container_name: forgejo-runners-{{ runner }}
+    image: code.forgejo.org/forgejo/runner:{{ forgejo_runners_version }}
+    user: {{ ansible_facts.getent_passwd.forgejo[1] }}:{{ ansible_facts.getent_passwd.forgejo[2] }}
+    environment:
+      DOCKER_HOST: tcp://docker:2376
+      DOCKER_TLS_VERIFY: 1
+      DOCKER_CERT_PATH: /certs/client
+    volumes:
+      - {{ forgejo_runners_config_dir }}/{{ runner }}:/data
+      - certs:/certs
+    command: 'forgejo-runner --config config.yml daemon'
+    networks:
+      - forgejo
+{% endfor %}
+
+volumes:
+  certs:
+
+networks:
+  forgejo:
+    external: true
+    name: forgejo_forgejo