Simplify Dockerfile

Dockerfile

@@ -1,26 +1,22 @@
 
-ARG NODE_VERSION=20.0.0
-
-FROM node:${NODE_VERSION}-alpine
+FROM node:20-alpine
 
 ENV NODE_ENV production
 
 WORKDIR /app
 
-
-RUN --mount=type=bind,source=package.json,target=package.json \
-    --mount=type=bind,source=package-lock.json,target=package-lock.json \
-    --mount=type=cache,target=/root/.npm 
-
-# Run the application as a root user.
-USER root
+# Install dependencies
+COPY package.json package-lock.json* ./
+RUN npm ci --omit=dev
 
 # Copy the rest of the source files into the image.
 COPY . .
 
+# Run the application as a root user.
+USER root
+
 # Expose the port that the application listens on.
 EXPOSE 8000
 
 # Run the application.
 CMD node app.js
-