.dockerignore

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+# .dockerignore
+
+.git
+.gitignore
+target/
+.env
+*.md
+Lavalink.jar
+application.yml

Dockerfile

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+# Dockerfile
+
+# ---- Planner Stage ----
+# Use the official Rust Alpine image as a base for planning.
+# We use the same base image for planner and builder for consistency.
+FROM rust:1-alpine AS planner
+WORKDIR /app
+# Install cargo-chef for build caching
+RUN apk add --no-cache musl-dev # Needed by chef
+RUN cargo install cargo-chef --locked
+COPY . .
+# Compute dependencies. This output will be cached if Cargo.toml/lock haven't changed.
+RUN cargo chef prepare --recipe-path recipe.json
+
+# ---- Builder Stage ----
+# Use the same Rust Alpine image for building.
+FROM rust:1-alpine AS builder
+WORKDIR /app
+# Install build dependencies for Alpine
+RUN apk add --no-cache build-base openssl-dev pkgconfig
+# Install cargo-chef again (could optimize but simpler this way)
+RUN cargo install cargo-chef --locked
+# Copy the dependency recipe from the planner stage
+COPY --from=planner /app/recipe.json recipe.json
+# Build dependencies based on the recipe. This layer is cached efficiently.
+RUN cargo chef cook --release --recipe-path recipe.json
+# Copy application code
+COPY . .
+# Build the application binary, linking against pre-built dependencies
+# Ensure the binary name matches your package name in Cargo.toml
+RUN cargo build --release --bin discord-music-bot-lavalink-rs
+
+# ---- Runtime Stage ----
+# Use a minimal Alpine image for the final runtime environment.
+FROM alpine:latest
+WORKDIR /app
+# Install runtime dependencies needed by the binary (e.g., SSL certs)
+RUN apk add --no-cache ca-certificates openssl
+# Copy the compiled application binary from the builder stage
+COPY --from=builder /app/target/release/discord-music-bot-lavalink-rs /app/
+# Set the binary as the entrypoint
+CMD ["./discord-music-bot-lavalink-rs"]

application.yml

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+# application.yml (Example)
+server: # REST and WS server
+  port: 2333
+  address: 0.0.0.0 # Listen on all interfaces within the container
+lavalink:
+  server:
+    password: "youshallnotpass" # CHANGE THIS to a strong password
+    sources:
+      youtube: true
+      bandcamp: true
+      soundcloud: true
+      twitch: true
+      vimeo: true
+      http: true
+      local: false
+    # bufferDurationMs: 400 # How many milliseconds of audio to buffer? Lower values are less safe.
+    # youtubePlaylistLoadLimit: 6 # Number of pages at 100 tracks each
+    # playerUpdateInterval: 5 # How frequently to send player updates to clients, in seconds
+    # youtubeSearchEnabled: true
+    # soundcloudSearchEnabled: true
+    # bandcampSearchEnabled: true # Not implemented by LavaLink currently
+    # Default values are generally fine
+    # You can find more options here: https://github.com/lavalink-devs/Lavalink/blob/master/IMPLEMENTATION.md#configuration
+logging:
+  file:
+    max-history: 30
+    max-size: 1GB
+  path: ./logs/
+
+  level:
+    root: INFO
+    lavalink: INFO

compose.yml

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+# docker-compose.yml
+
+version: '3.8'
+
+services:
+  # The Rust Discord Bot Service
+  app:
+    # Build the image from the Dockerfile in the current directory (.)
+    build: .
+    container_name: discord-bot-app
+    restart: unless-stopped
+    # Pass environment variables from the .env file
+    env_file:
+      - .env
+    # Depend on the lavalink service to ensure it starts first (best practice)
+    depends_on:
+      - lavalink
+
+  # The LavaLink Service
+  lavalink:
+    # Use a Java Runtime Environment image (Alpine base for smaller size)
+    image: eclipse-temurin:17-jre-alpine
+    container_name: lavalink-server
+    restart: unless-stopped
+    # Set the working directory inside the container
+    working_dir: /opt/lavalink
+    # Mount the local Lavalink.jar and application.yml into the container
+    volumes:
+      - ./Lavalink.jar:/opt/lavalink/Lavalink.jar:ro # Mount Jar read-only
+      - ./application.yml:/opt/lavalink/application.yml:ro # Mount config read-only
+      - ./logs:/opt/lavalink/logs # Mount logs directory (optional)
+    # Expose the LavaLink port to the host machine (optional, but useful for debugging)
+    # and makes it reachable by the 'app' service via Docker network.
+    ports:
+      - "2333:2333"
+    # Command to run LavaLink inside the container
+    command: ["java", "-jar", "Lavalink.jar"]
+
+# Define networks (optional, Docker Compose creates a default one)
+# networks:
+#   default:
+#     driver: bridge
+
+# Define volumes (optional, if you need persistent data beyond logs)
+# volumes:
+#   lavalink_logs: