chore: update dockerfile

docker/Dockerfile

@@ -1,22 +1,41 @@
 # syntax=docker/dockerfile:1
-FROM node:20.12.0 AS builder
+# Build stage
+FROM node:20.12.0-alpine AS builder
+
+# Set production environment
+ENV NODE_ENV=production
 
 WORKDIR /app
 
-ARG VERSION=main
+# Copy package files first for better layer caching
+COPY package.json pnpm-lock.yaml ./
 
+# Enable corepack and install dependencies
+RUN corepack enable && \
+    pnpm install --frozen-lockfile
+
+# Copy source code
 COPY . .
-RUN corepack enable
-RUN pnpm install
 
-# Build without environment variables - they will be injected at runtime
+# Build the application
 RUN pnpm run build
 
-FROM nginx:alpine
+# Production stage
+FROM nginx:1.25-alpine
+
+# Install runtime dependencies
+RUN apk add --no-cache tini
+
+# Copy built application
 COPY --from=builder /app/dist /usr/share/nginx/html/
+
+# Copy configuration files
 COPY --from=builder /app/docker/nginx.conf /etc/nginx/nginx.conf
 COPY --from=builder /app/docker/entrypoint.sh /docker-entrypoint.sh
+
+# Make entrypoint executable
 RUN chmod +x /docker-entrypoint.sh
 
-# Set the entrypoint
-ENTRYPOINT ["/docker-entrypoint.sh"]
+
+# Use tini to handle signals properly
+ENTRYPOINT ["/sbin/tini", "--", "/docker-entrypoint.sh"]