chore(docker): reduce Docker image size by optimizing dependency installations

- Use multi-stage builds to prune development dependencies
- Achieve reduced final image size by installing only necessary runtime dependencies

Dockerfile

@@ -1,24 +1,36 @@
-# Use an official Node.js version as base image
-FROM node:22-slim
+# Stage 1: Setup Dependencies
+FROM node:22-slim AS dependencies
+WORKDIR /app
 
-# Install dependencies, including ffmpeg
+# Install runtime dependencies (ffmpeg and chromaprint-tools)
 RUN apt-get update && \
     apt-get install -y ffmpeg libchromaprint-tools && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/*
 
-# Set the working directory inside the container
-WORKDIR /app
-
-# Copy package.json and package-lock.json to the working directory
+# Copy package.json and package-lock.json to install Node.js dependencies
 COPY package*.json ./
-
-# Install Node.js dependencies
 RUN npm install
 
-# Copy the rest of the application files to the working directory
+# Copy source files
 COPY . .
 
+# Stage 2: Final Stage
+FROM node:22-slim
+WORKDIR /app
+
+# Install runtime dependencies again (ffmpeg and chromaprint-tools)
+RUN apt-get update && \
+    apt-get install -y ffmpeg libchromaprint-tools && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
+# Copy application files and dependencies from dependencies stage
+COPY --from=dependencies /app /app
+
+# Prune development dependencies
+RUN npm prune --production
 
 # Specify the command to run your CLI application
 ENTRYPOINT ["node", "--env-file", ".env", "cli.js"]
+