add dockerfile and github actions workflow for deploy

.dockerignore

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+node_modules
+npm-debug.log
+build
+tmp

.github/workflows/deploy.yml

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+name: Deploy to DigitalOcean
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v2
+        with:
+          push: true
+          tags: ershisan99/flashcards:latest
+
+      - name: SSH and Deploy to Droplet
+        uses: appleboy/ssh-action@master
+        with:
+          host: ${{ secrets.DROPLET_IP }}
+          username: root
+          password: ${{ secrets.SSH_PASSWORD }}  # Using password instead of key
+          script: |
+            docker pull ershisan99/flashcards:latest
+            docker stop flashcards || true
+            docker rm flashcards || true
+            docker run -d --name flashcards -p 80:3333 ershisan99/flashcards:latest

Dockerfile

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+# Use the official Node.js LTS as a parent image
+FROM node:lts-alpine
+
+# Set the working directory in the Docker container
+WORKDIR /usr/src/app
+
+# Install pnpm
+RUN npm install -g pnpm
+
+# Copy package.json, pnpm-lock.yaml (or package-lock.json if you use it) to the Docker container
+COPY package.json pnpm-lock.yaml ./
+
+# Install dependencies
+RUN pnpm install --frozen-lockfile
+
+# Copy the rest of your application's code into the Docker container
+COPY . .
+
+# Generate Prisma client
+RUN npx prisma generate
+
+# Build your NestJS application
+RUN pnpm run build
+
+ENV PORT 3333
+
+# Expose the port the app runs on
+EXPOSE 3333
+
+# Command to run when starting the container
+CMD ["node", "dist/main"]

docker-compose.yml

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+stages:
+  - build
+  - deploy
+
+variables:
+  IMAGE_NAME: registry.gitlab.com/cargo-solutions/api
+  IMAGE_TAG: ${CI_COMMIT_SHA}
+
+build:
+  stage: build
+  image: docker:stable
+  services:
+    - docker:dind
+  script:
+    - sudo apt-get update && sudo apt-get install -y python3-pip python3-dev libffi-dev libssl-dev gcc libc6-dev make && sudo rm -rf /var/lib/apt/lists/*
+    - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY_IMAGE
+    - docker build -t api:latest .
+    - docker tag api registry.gitlab.com/r-et-d/todo-api:latest
+    - docker tag api:latest registry.gitlab.com/r-et-d/todo-api:${CI_COMMIT_SHA}
+    - docker push registry.gitlab.com/r-et-d/todo-api:latest
+    - docker push registry.gitlab.com/r-et-d/todo-api:${CI_COMMIT_SHA}
+  only:
+    - master
+
+deploy:
+  stage: deploy
+  image: ubuntu:20.04
+  script:
+    - export DEBIAN_FRONTEND=noninteractive
+    - sudo apt-get update -y
+    - sudo apt-get install -y apt-transport-https ca-certificates curl software-properties-common openssh-client
+    - echo "$SSH_PRIVATE_KEY" | tr -d '\r' > id_rsa
+    - sudo chmod 600 id_rsa
+    - ssh -i id_rsa -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null $SSH_USER@$SSH_HOST "\cd /home/ci && \git pull && \cd && \docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $IMAGE_NAME && \bash /home/ci/docker-compose restart"
+  only:
+    - master