fix: Update Dockerfile and add .dockerignore

.dockerignore

@@ -0,0 +1,31 @@
+# Include any files or directories that you don't want to be copied to your
+# container here (e.g., local build artifacts, temporary files, etc.).
+#
+# For more help, visit the .dockerignore file reference guide at
+# https://docs.docker.com/engine/reference/builder/#dockerignore-file
+
+**/.dockerignore
+**/.env.example
+**/.git
+**/.gitignore
+**/.gitattributes
+**/.github
+**/.vscode
+**/Dockerfile*
+**/node_modules
+**/npm-debug.log
+**/build
+**/dist
+**/logs
+**/assets
+.editorconfig
+.eslintrc.json
+.prettierrc
+CHANGELOG.md
+CODE_OF_CONDUCT.md
+CONTRIBUTING.md
+LICENSE.md
+PRIVACY-POLICY.md
+README.md
+SECURITY.md
+TERMS-OF-SERVICE.md

Dockerfile

@@ -1,30 +1,25 @@
-# Using Node 18.16.1 (LTS) on Alpine base
-FROM node:18.16-alpine
+# syntax=docker/dockerfile:1
+
+# Using Node 18.16 (LTS) on Alpine base
+ARG NODE_VERSION=18.16
+FROM node:${NODE_VERSION}-alpine
 
 # Install npm build dependencies and ffmpeg
 RUN apk add --no-cache python3 make build-base ffmpeg git
 
-# Clone Cadence repository - Shallow clone used to avoid including entire git history.
-RUN git clone --depth 1 https://github.com/mariusbegby/cadence-discord-bot.git /cadence-discord-bot
-
 # Set work directory for subsequent commands
 WORKDIR /cadence-discord-bot
 
-# Install dependencies from package-lock.json and omit dev dependencies
-RUN npm ci --omit=dev
+# Copy the rest of the source files into the image.
+COPY . .
 
-# Remove unnecessary files
-RUN rm -rf /assets
-RUN rm -rf /.github
-
-# Copy .env and config file to docker container
-# Do NOT share the built image with anyone as it will contain the .env file
-# Optionally skip this step and set environment variables manually
-COPY .env .env
-COPY *local.js config/local.js
+# Install dependencies from package-lock.json and omit dev dependencies
+# Leverage a cache mount to /root/.npm to speed up subsequent builds.
+RUN --mount=type=cache,target=/root/.npm \
+    npm ci --omit=dev
 
 # Deploy Slash Commands to Discord API
 RUN npm run deploy
 
 # Startup command to run the bot
-CMD [ "npm", "start" ]
+CMD [ "npm", "run", "start" ]