fix ports

docker-compose.yml

@@ -4,10 +4,11 @@ services:
       context: .
       dockerfile: Dockerfile
     ports:
-      - "$PORT:$PORT"
+      - "${PORT:-8080}:${PORT:-8080}"
     depends_on:
       - mailpit
     environment:
+      PORT: "${PORT:-8080}"
       CAIRNQUIRE_DATABASE_PATH: "/workspace/data/db.sqlite"
       CAIRNQUIRE_CONTENT_SOURCE_DIR: "/workspace/content"
       CAIRNQUIRE_CONTENT_STORE_DIR: "/workspace/data/files"
@@ -20,7 +21,7 @@ services:
       - cairnquire_data:/workspace/data
       - ./content:/workspace/content
     healthcheck:
-      test: ["CMD", "curl", "--fail", "http://127.0.0.1:${PORT}/healthz"]
+      test: ["CMD", "curl", "--fail", "http://127.0.0.1:${PORT:-8080}/healthz"]
       interval: 10s
       timeout: 3s
       retries: 5