Initial ByteGeist Toolbox uptime checker

Dockerfile

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+# Use a small official Node.js image.
+FROM node:22-alpine
+
+# Set the working directory inside the container.
+WORKDIR /app
+
+# Copy package files first so Docker can cache dependency installs.
+COPY package*.json ./
+
+# Install production dependencies only.
+RUN npm ci --omit=dev
+
+# Copy the rest of the project files.
+COPY . .
+
+# Document the port used by the application.
+EXPOSE 3001
+
+# Start the Node.js server.
+CMD ["npm", "start"]