Merge branch 'feature/pipeline' into 'dev'

Add Dockerfile and GitLab CI pipeline for deployment

See merge request rheinsw/website!1

Dockerfile

@@ -0,0 +1,31 @@
+# Use lightweight Node.js 20 base image
+FROM node:20-alpine as builder
+
+# Set working directory
+WORKDIR /app
+
+# Copy package files separately for better Docker caching
+COPY package.json package-lock.json ./
+
+# Install dependencies
+RUN npm install
+
+# Copy entire project
+COPY . .
+
+# Build the Next.js app
+RUN npm run build
+
+# Use a minimal base image for running the app
+FROM node:20-alpine
+
+WORKDIR /app
+
+# Copy built files from the builder stage
+COPY --from=builder /app ./
+
+# Expose port
+EXPOSE 3000
+
+# Start Next.js in production mode
+CMD ["npm", "run", "start"]