Add backend Dockerfile

backend/Dockerfile

@@ -0,0 +1,38 @@
+FROM node:18-alpine AS builder
+
+WORKDIR /app
+
+# Copy package files
+COPY package*.json ./
+
+# Install dependencies
+RUN npm ci --only=production
+
+# Copy application files
+COPY . .
+
+# Production stage
+FROM node:18-alpine
+
+WORKDIR /app
+
+# Install dumb-init for proper signal handling
+RUN apk add --no-cache dumb-init
+
+# Create non-root user
+RUN addgroup -g 1001 -S nodejs && adduser -S nodejs -u 1001
+
+# Copy from builder
+COPY --from=builder --chown=nodejs:nodejs /app/node_modules ./node_modules
+COPY --chown=nodejs:nodejs . .
+
+# Create necessary directories
+RUN mkdir -p storage/events/active storage/events/archived storage/thumbnails data logs && \
+    chown -R nodejs:nodejs storage data logs
+
+USER nodejs
+
+EXPOSE 3000
+
+ENTRYPOINT ["dumb-init", "--"]
+CMD ["node", "server.js"]