fix: resolve Docker build cache miss and pnpm filter errors

Dockerfile

@@ -2,38 +2,24 @@ FROM node:18-alpine
 
 WORKDIR /app
 
-# Install pnpm and global dependencies
-RUN npm install -g pnpm turbo
+# Install pnpm
+RUN npm install -g pnpm
 
-# Copy root package files
-COPY package.json pnpm-workspace.yaml turbo.json ./
+# Copy ALL workspace files first for a proper pnpm install
+COPY package.json pnpm-workspace.yaml ./
+COPY packages/ packages/
+COPY apps/ apps/
+COPY scripts/ scripts/
 
-# Copy package configurations
-COPY packages/tsconfig packages/tsconfig
-COPY packages/database packages/database
-COPY packages/shared-types packages/shared-types
-
-# Copy app configurations
-COPY apps/api/package.json apps/api/package.json
-COPY apps/whatsapp-worker/package.json apps/whatsapp-worker/package.json
-COPY apps/api/tsconfig.json apps/api/tsconfig.json
-COPY apps/whatsapp-worker/tsconfig.json apps/whatsapp-worker/tsconfig.json
-
-# Install dependencies
+# Install all dependencies (this handles workspaces correctly)
 RUN pnpm install
 
-# Copy source code
-COPY packages/database packages/database
-COPY packages/shared-types packages/shared-types
-COPY apps/api apps/api
-COPY apps/whatsapp-worker apps/whatsapp-worker
-COPY scripts/start-backend.sh scripts/start-backend.sh
-
 # Generate Prisma Client
 RUN pnpm db:generate
 
-# Build packages and apps
-RUN pnpm build --filter=api --filter=whatsapp-worker...
+# Build the specific apps
+RUN pnpm --filter api build
+RUN pnpm --filter whatsapp-worker build
 
 # Make script executable
 RUN chmod +x scripts/start-backend.sh
@@ -44,3 +30,4 @@ ENV PORT=7860
 
 # Start command
 CMD ["./scripts/start-backend.sh"]
+