Added Tinybird migrations (#2)

no refs

The current setup runs the base Ghost installation without Traffic Analytics functionality. This commit adds:

- `tinybird-sync` service, which copies the latest Tinybird datafiles from the `ghost` container into a shared volume
- `tinybird-deploy` service & Dockerfile that includes the `tb` CLI, and runs `tb --cloud deploy` on boot
- Instructions for one-time manual setup of the Tinybird workspace in `TINYBIRD.md`

After the one-time manual setup, this configuration should automatically update Tinybird's datasources and endpoints in sync with the Ghost container when it is updated.


The initial setup is a bit clumsy and requires more manual steps than expected:
- The tinybird datafiles are in the Ghost image, but we need to access them from the `tinybird-deploy` service, which includes the `tb` CLI.
- When creating a new workspace in Tinybird, you can't access your admin token right away. Instead, it forces you to run `tb login` and `tb --cloud deploy` before you can access the rest of your workspace UI. This requires the user to install the `tb` CLI locally, and run an interactive login to authenticate with their Tinybird workspace. The generated `.tinyb` file is then mounted into the `tinybird-deploy` container, so this is only required for initial setup.
- Ghost requires the Tinybird `stats` and `tracker` token to be provided at boot. This means the user has to manually copy these tokens (either from CLI or the Workspace UI) and add them to their `.env` file manually. 
- We may want to either publish the Docker image with the Tinybird CLI installed, or possibly add the `tb` CLI to the traffic-analytics container.

compose.yml

@@ -30,16 +30,23 @@ services:
       database__connection__database: ghost
       enableDeveloperExperiments: true
       tinybird__tracker__endpoint: https://${DOMAIN:?DOMAIN environment variable is required}/.ghost/analytics/tb/web_analytics
-      tinybird__tracker__id: ${TINYBIRD_ID}
+      tinybird__tracker__id: ${TINYBIRD_ID:-}
       tinybird__tracker__datasource: analytics_events
-      tinybird__tracker__token: ${TINYBIRD_TOKEN}
-      tinybird__stats__endpoint: https://api.tinybird.co
-      tinybird__stats__id: ${TINYBIRD_ID}
-      tinybird__stats__token: ${TINYBIRD_TOKEN}
+      tinybird__tracker__token: ${TINYBIRD_TRACKER_TOKEN:-}
+      tinybird__stats__endpoint: ${TINYBIRD_API_URL:-https://api.tinybird.co}
+      tinybird__stats__id: ${TINYBIRD_ID:-}
+      tinybird__stats__token: ${TINYBIRD_STATS_TOKEN:-}
     volumes:
       - ghost_content:/var/lib/ghost/content
     depends_on:
-      - db
+      db:
+        condition: service_healthy
+      tinybird-sync:
+        condition: service_completed_successfully
+        required: false
+      tinybird-deploy:
+        condition: service_completed_successfully
+        required: false
     networks:
       - ghost_network
 
@@ -57,6 +64,10 @@ services:
     volumes:
       - db_data:/var/lib/mysql
       - ./mysql-init:/docker-entrypoint-initdb.d
+    healthcheck:
+      test: mysql -u${DATABASE_USER:-ghost} -p${DATABASE_PASSWORD:?DATABASE_PASSWORD environment variable is required} ghost -e 'select 1'
+      interval: 1s
+      retries: 120
     networks:
       - ghost_network
 
@@ -67,15 +78,57 @@ services:
       - "3000"
     environment:
       NODE_ENV: production
-      PROXY_TARGET: https://api.tinybird.co/v0/events
+      PROXY_TARGET: ${TINYBIRD_API_URL:-https://api.tinybird.co}/v0/events
+      LOG_LEVEL: debug
+    profiles: [analytics]
     networks:
       - ghost_network
 
+  tinybird-sync:
+    image: ghost:5-alpine
+    command: >
+      sh -c "
+        if [ -d /var/lib/ghost/current/core/server/data/tinybird ]; then
+          rm -rf /shared/tinybird/*;
+          cp -rf /var/lib/ghost/current/core/server/data/tinybird/* /shared/tinybird/;
+          echo 'Tinybird files synced into shared volume.';
+        else
+          echo 'Tinybird source directory not found.';
+        fi
+      "
+    volumes:
+      - tinybird_files:/shared/tinybird
+    networks:
+      - ghost_network
+    profiles: [analytics]
+    restart: no
+
+  tinybird-deploy:
+    build:
+      context: ./tinybird
+      dockerfile: Dockerfile
+    working_dir: /home/tinybird
+    command: >
+      sh -c "
+        tb --cloud deploy
+      "
+    volumes:
+      - .tinyb:/home/tinybird/.tinyb
+      - tinybird_files:/home/tinybird
+    depends_on:
+      tinybird-sync:
+        condition: service_completed_successfully
+    profiles: [analytics]
+    networks:
+      - ghost_network
+    tty: true
+
 volumes:
   ghost_content:
   db_data:
   caddy_data:
   caddy_config:
+  tinybird_files:
 
 networks:
   ghost_network: