[a] docker container and workflow

.forgejo/workflows/build.yml

@@ -0,0 +1,47 @@
+name: Build and Push Docker Image
+
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - "v*"
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ gitea.repository }}
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-22.04:docker://ghcr.io/catthehacker/ubuntu:act-22.04
+    steps:
+      - name: ⬇️ Checkout repository
+        uses: actions/checkout@v3
+
+      - name: 👤 Log in to the Container registry
+        uses: github.com/docker/login-action@v2
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ gitea.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: ✏️ Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: github.com/docker/metadata-action@v4
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=ref,event=branch
+            type=ref,event=tag
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}
+            type=sha
+
+      - name: 🛠️ Build and push Docker image
+        uses: github.com/docker/build-push-action@v4
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

Dockerfile

@@ -0,0 +1,10 @@
+FROM node:14
+WORKDIR /app
+
+COPY package*.json ./
+RUN npm install
+COPY . .
+
+#
+EXPOSE 3000
+CMD ["node", "main.js"]

README.md

@@ -14,6 +14,21 @@ RATE_LIMIT_MINUTES=15 # the amount of time in minutes to rate limit
 RATE_LIMIT_REQUESTS=100 # amount of max. requests
 ```
 
+Don't change the `PORT` value when running in a Docker Container. Instead, export a different port and forward that to the container's port `3000`.
+
+```yml
+# example for docker-compose.yml:
+ports:
+  - "5678:3000"
+```
+
+You also have to mount the `.env` file inside the container, if you're using Docker:
+
+```yml
+volumes:
+  - .env:/app/.env
+```
+
 ## Run the API
 
 ```bash