Add Dockerfile

Dockerfile

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+# Use the official Rust image as a base
+FROM rust:1.84-bullseye
+
+# Set the working directory to /app
+WORKDIR /app
+
+# Copy files used to build application into working directory
+COPY ./Cargo.toml ./
+COPY ./Cargo.lock ./
+
+COPY ./cipher_core ./cipher_core
+COPY ./cipher_database ./cipher_database
+COPY ./cipher_discord_bot ./cipher_discord_bot
+
+# Build the application using Cargo
+RUN cargo build --release
+
+# Copy the built application into the working directory
+# COPY target/release/cipher_discord_bot /app/cipher_discord_bot
+
+# Run the application when the container starts
+CMD ./target/release/cipher_discord_bot start