Add dockerfile and sample docker compose

Dockerfile

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+# Use the official Rust image as the base image
+FROM rust:1.81 AS builder
+
+# Install protobuf compiler
+RUN apt-get update && apt-get install -y protobuf-compiler
+
+# Create a new directory for the application
+WORKDIR /app
+
+# Copy the entire project
+COPY . .
+
+# Build dependencies and the project
+RUN cargo build --release
+
+# Create a new stage with a minimal image
+FROM ubuntu:22.04 AS final
+
+# Install necessary runtime dependencies
+RUN apt-get update && \
+    apt-get install -y libssl3 ca-certificates && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
+# Copy the built executables from the builder stage
+COPY --from=builder /app/target/release/lndk /usr/local/bin/lndk
+COPY --from=builder /app/target/release/lndk-cli /usr/local/bin/lndk-cli
+
+# Set the startup command
+CMD ["lndk"]

sample-docker-compose.yaml

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+services:
+  lnd:
+    container_name: lnd
+    image: docker.io/lightninglabs/lnd:v0.18.3-beta.rc3
+    restart: unless-stopped
+    stop_grace_period: 15m30s
+    volumes:
+      - /root/lnd:/root/.lnd
+    ports:
+      - "9735:9735"
+      - "10009:10009"
+      - "4000:4000"
+    command:
+        lnd
+
+  lndk:
+    container_name: lndk
+    image: lndk
+    depends_on: [lnd]
+    restart: on-failure
+    stop_grace_period: 20s
+    volumes:
+      - /root/lnd:/lnd:ro
+    command: >
+      lndk --address=https://lnd:10009 --cert-path=/lnd/tls.cert --macaroon-path=/lnd/data/chain/bitcoin/mainnet/admin.macaroon
+    environment:
+      - RUST_LOG=info