Add Dockerfile

Dockerfile

@@ -1,11 +1,21 @@
+# Build Stage
 FROM node:20-slim as builder
 WORKDIR /usr/src/app
-COPY package.json .
-RUN npm ci
-RUN npm install
 
+# Copy dependency files first for caching
+COPY package.json package-lock.json ./
+RUN npm ci
+
+# Copy the rest of the source files
+COPY . .
+
+# Final Stage
 FROM node:20-slim
 WORKDIR /usr/src/app
+
+# Copy only the built application and production dependencies
 COPY --from=builder /usr/src/app/ /usr/src/app/
-COPY . .
-CMD ["npx", "@11ty/eleventy", "--serve", "--port", "3000"]
+RUN npm prune --production
+
+# Default command to run Eleventy in serve mode
+CMD ["npx", "@11ty/eleventy", "--serve", "--port", "4000"]