ci: fix woodpecker registry secrets and base images

.woodpecker.yml

@@ -13,6 +13,9 @@ steps:
       REGISTRY_PASSWORD:
         from_secret: REGISTRY_PASSWORD
     commands:
+      - test -n "${REGISTRY_HOSTPORT}"
+      - test -n "${REGISTRY_USERNAME}"
+      - test -n "${REGISTRY_PASSWORD}"
       - echo "${REGISTRY_PASSWORD}" | docker login "${REGISTRY_HOSTPORT}" -u "${REGISTRY_USERNAME}" --password-stdin
       - docker build -t "${REGISTRY_HOSTPORT}/nxtgauge-admin-solid" -f Dockerfile.simple .
       - docker push "${REGISTRY_HOSTPORT}/nxtgauge-admin-solid"

README.md

@@ -7,6 +7,13 @@ Port admin modules one by one with strict API/permission parity.
 
 See `docs/MIGRATION_MASTER_PLAN.md`.
 
+## CI (Woodpecker)
+
+Required secrets:
+- `REGISTRY_HOSTPORT`
+- `REGISTRY_USERNAME`
+- `REGISTRY_PASSWORD`
+
 ## This project was created with the [Solid CLI](https://github.com/solidjs-community/solid-cli)
 
 ## Local Docker test (low RAM, no port conflict)