feat: Add Docker and GitHub Actions for CI/CD

Dockerfile

@@ -0,0 +1,48 @@
+# --- Base Stage ---
+# Use a lightweight and secure Node.js base image
+FROM node:20-alpine AS base
+
+# Set the working directory in the container
+WORKDIR /usr/src/app
+
+# Copy package files and install dependencies
+# This leverages Docker's layer caching
+COPY package*.json ./
+RUN npm install --only=production
+
+
+# --- Build Stage ---
+# This stage builds the static assets
+FROM base AS build
+
+# Install all dependencies (including devDependencies) to run the build script
+COPY package*.json ./
+RUN npm install
+
+# Copy the rest of the application source code
+COPY . .
+
+# Run the build script to minify CSS and JS
+RUN npm run build
+
+
+# --- Production Stage ---
+# This is the final, lean image that will be run
+FROM base AS production
+
+# Set a non-root user for security
+RUN addgroup -S appgroup && adduser -S appuser -G appgroup
+USER appuser
+
+# Copy only the necessary files from the previous stages
+COPY --from=build /usr/src/app/node_modules ./node_modules
+COPY --from=build /usr/src/app/static ./static
+COPY --from=build /usr/src/app/lib ./lib
+COPY --from=build /usr/src/app/server.js .
+COPY --from=build /usr/src/app/config.json .
+
+# Expose the port the app runs on
+EXPOSE 8080
+
+# The command to start the application
+CMD [ "node", "server.js" ]