v0.1.4 — prebuilt Docker image on GHCR (closes #5)

Adds a GitHub Actions workflow that builds and pushes the Docker image
to ghcr.io/rgjorge/containerflow on every tag push, so end users can run
ContainerFlow without cloning the repo or building locally.

- New workflow: .github/workflows/docker-release.yml
- docker-compose.yml: uses the prebuilt image from GHCR by default
- New docker-compose.local.yml: override for building from source (devs)
- .env.example: simplified + adds COMPOSE_FILE toggle for local build
- README EN + ES: quick-start updated to no-clone flow
- .gitignore: ignore task/ planning notes dir

docker-compose.yml

@@ -1,6 +1,8 @@
 services:
   containerflow:
-    build: .
+    # Pulls the latest prebuilt image from GHCR.
+    # To build from source locally instead, see docker-compose.local.yml + COMPOSE_FILE in .env.
+    image: ghcr.io/rgjorge/containerflow:latest
     ports:
       - "${EXTERNAL_PORT:-9470}:9470"
     volumes: