Docker tweaks and node update

Signed-off-by: kingthorin <kingthorin@users.noreply.github.com>

Dockerfile

@@ -1,21 +1,24 @@
-FROM node:18
-
-COPY package-lock.json package.json  /app/
-
-WORKDIR /app
-
-RUN npm install
+FROM node:22
+
+# Create app directory
+WORKDIR /app
+
+# Copy package files and install dependencies
+COPY package-lock.json package.json /app/
+RUN npm install
+
+# Copy configuration files
+COPY .babelrc .eslintrc.yml .nvmrc postcss.config.js webpack.common.js webpack.dev.js webpack.prod.js /app/
+
+# Copy source files
+COPY site/ /app/site
+COPY src/ /app/src
+
+# Build the application
+RUN npm run build
 
-COPY .babelrc \
-    .eslintrc.yml \
-    .nvmrc \
-    postcss.config.js \
-    webpack.common.js \
-    webpack.dev.js \
-    webpack.prod.js /app/
-
-COPY site/ /app/site
-COPY src/ /app/src
+# Use a non-root user
+RUN groupadd -r appusers && useradd --no-log-init -r -g appusers appuser
 
-RUN npm run build
-CMD npm run preview
+# Run the application
+CMD ["npm", "run", "preview"]