chore(docker): simplify entrypoint — use log helper, remove seed copy (#130)

Flyway now handles database initialization, so the seed copy logic is
no longer needed. Align with the Rust entrypoint style: use a log()
helper for formatted output, add Swagger UI endpoint to the startup
banner, keep health check endpoint.

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: nanotaboada

scripts/entrypoint.sh

@@ -1,37 +1,28 @@
 #!/bin/sh
 set -e
 
-echo "✔ Executing entrypoint script..."
+# Helper function for formatted logging
+log() {
+    echo "[ENTRYPOINT] $(date '+%Y/%m/%d - %H:%M:%S') | $1"
+    return 0
+}
 
-IMAGE_STORAGE_PATH="/app/hold/players-sqlite3.db"
-VOLUME_STORAGE_PATH="/storage/players-sqlite3.db"
+log "✔ Starting container..."
 
-echo "✔ Starting container..."
+STORAGE_PATH="${STORAGE_PATH:-storage/players-sqlite3.db}"
 
-if [ ! -f "$VOLUME_STORAGE_PATH" ]; then
-  echo "⚠️ No existing database file found in volume."
-  if [ -f "$IMAGE_STORAGE_PATH" ]; then
-    echo "Copying database file to writable volume..."
-    if cp "$IMAGE_STORAGE_PATH" "$VOLUME_STORAGE_PATH"; then
-      echo "✔ Database initialized at $VOLUME_STORAGE_PATH"
-    else
-      echo "❌ Failed to copy database from $IMAGE_STORAGE_PATH to $VOLUME_STORAGE_PATH"
-      echo "   Check file permissions and available disk space."
-      exit 1
-    fi
-  else
-    echo "⚠️ Database file missing at $IMAGE_STORAGE_PATH"
-    exit 1
-  fi
+mkdir -p "$(dirname "$STORAGE_PATH")"
+
+if [ ! -f "$STORAGE_PATH" ]; then
+    log "⚠️ No existing database file found at $STORAGE_PATH."
+    log "🗄️ Flyway migrations will initialize the database on first start."
 else
-  echo "✔ Existing database file found. Skipping seed copy."
+    log "✔ Existing database file found at $STORAGE_PATH."
 fi
 
-echo "✔ Ready!"
-echo "🚀 Launching app..."
-echo ""
-echo "🔌 Endpoints:"
-echo "   Health:  http://localhost:9001/actuator/health"
-echo "   Players: http://localhost:9000/players"
-echo ""
+log "✔ Ready!"
+log "🚀 Launching app..."
+log "🔌 API endpoints | http://localhost:9000"
+log "📚 Swagger UI    | http://localhost:9000/swagger/index.html"
+log "❤️  Health check  | http://localhost:9001/actuator/health"
 exec "$@"