Make public Actions jobs reach Gitea and ship a reproducible runner config

Hop-State: A_06FN8CS9DAAY6Y1H4EXBHQR
Hop-Proposal: R_06FN8CQ66FNTSWJM719J62R
Hop-Task: T_06FN8CFTH482VPYR9WSGDZG
Hop-Attempt: AT_06FN8CFTH7YYHAXDYGDXVRR

compose.yaml

@@ -52,11 +52,11 @@ services:
       gitea:
         condition: service_started
     environment:
-      GITEA_INSTANCE_URL: http://gitea:3000
+      GITEA_INSTANCE_URL: ${GITEA_ROOT_URL:-http://localhost:3000/}
       GITEA_RUNNER_REGISTRATION_TOKEN: ${GITEA_RUNNER_REGISTRATION_TOKEN:-}
       GITEA_RUNNER_NAME: ${GITEA_RUNNER_NAME:-cyphers-public}
       GITEA_RUNNER_LABELS: ${GITEA_RUNNER_LABELS:-ubuntu-latest:docker://gitea/runner-images:ubuntu-latest,ubuntu-22.04:docker://gitea/runner-images:ubuntu-22.04}
-      CONFIG_FILE: /data/config.yaml
+      CONFIG_FILE: /config.yaml
     cpus: "2.0"
     mem_limit: 4g
     pids_limit: 1024
@@ -65,6 +65,7 @@ services:
     privileged: true
     volumes:
       - actions-runner-data:/data
+      - ./deploy/gitea/actions-runner-config.yaml:/config.yaml:ro
     networks: [hopweb]
 
   control-plane: