fix: switch from npm ci to npm install in Dockerfile

Dockerfile

@@ -1,33 +1,33 @@
-# 1. Dependencies installieren
+# 1. Install dependencies
 FROM node:20-alpine AS deps
 WORKDIR /app
 COPY package*.json ./
-RUN npm ci
+RUN npm install
 
-# 2. Anwendung bauen
+# 2. Build the application
 FROM node:20-alpine AS builder
 WORKDIR /app
 COPY --from=deps /app/node_modules ./node_modules
 COPY . .
 RUN npm run build
 
-# 3. Production Image ausführen (Node.js Server)
+# 3. Run production image (Node.js server)
 FROM node:20-alpine AS runner
 WORKDIR /app
 
 ENV NODE_ENV=production
 ENV PORT=3000
 
-# Systemnutzer anlegen für mehr Sicherheit
+# Create a system user for enhanced security
 RUN addgroup --system --gid 1001 nodejs
 RUN adduser --system --uid 1001 nextjs
 
-# Public & Standalone Build kopieren
+# Copy public assets and standalone build output
 COPY --from=builder /app/public ./public
 COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
 COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
 
-# Ordner für Analytics-Daten anlegen und Schreibrechte vergeben
+# Create analytics data directory and assign proper permissions
 RUN mkdir -p /app/data && chown -R nextjs:nodejs /app/data
 
 USER nextjs