Fix: Remove bun.lockb from COPY (use optional lockfile)

Dockerfile

@@ -7,10 +7,10 @@ WORKDIR /app
 RUN corepack enable && corepack prepare bun@latest --activate
 
 # Copy package files
-COPY package.json bun.lockb ./
+COPY package.json ./
 
-# Install dependencies
-RUN bun install --frozen-lockfile
+# Install dependencies (lockfile optional)
+RUN bun install
 
 # Copy entire project
 COPY . .