add docker and compose file

Dockerfile

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+# Step 1: Use the official Rust image as the build environment
+FROM rust:latest AS builder
+
+# Step 2: Create a new directory for the app
+WORKDIR /usr/src/era-test-node
+
+# Step 3: Copy the local files to the container
+COPY . .
+
+# Step 4: Build the Rust program
+RUN cargo build --release
+
+# Use a newer base image for the runtime
+FROM ubuntu:latest
+
+ARG CHAIN_ID
+ENV CHAIN_ID=${CHAIN_ID}
+
+# Set up dependencies
+RUN apt-get update && apt-get install -y ca-certificates && rm -rf /var/lib/apt/lists/*
+
+# Step 7: Set up a user for running the server
+ENV USER=era-test-node
+RUN useradd -m $USER
+
+# Step 8: Copy the compiled binary from the build container
+COPY --from=builder /usr/src/era-test-node/target/release/era_test_node /usr/local/bin/era_test_node
+
+# Step 9: Verify and set execute permissions
+RUN ls -l /usr/local/bin/era_test_node  # List permissions for debugging
+RUN chmod +x /usr/local/bin/era_test_node && \
+    chown -R $USER:$USER /usr/local/bin/era_test_node
+
+# Step 10: Switch to the new user
+USER root
+
+# Step 11: Expose the server port
+EXPOSE 8011
+
+# Step 12: Explicitly run the server binary with its full path
+CMD ["sh", "-c", "/usr/local/bin/era_test_node --chain-id ${CHAIN_ID}"]

docker-compose.yml

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+version: '3.8'
+
+services:
+  era-test-node1:
+    build:
+      context: .
+      dockerfile: Dockerfile
+      args:
+        CHAIN_ID: 500
+    ports:
+      - "8012:8011"
+    environment:
+      - NODE_NAME=era-test-node1
+    networks:
+      - era-network
+
+  era-test-node2:
+    build:
+      context: .
+      dockerfile: Dockerfile
+      args:
+        CHAIN_ID: 501
+    ports:
+      - "8013:8011"
+    environment:
+      - NODE_NAME=era-test-node2
+    networks:
+      - era-network
+
+networks:
+  era-network:
+    driver: bridge