Added Docker build workflow and updated Dockerfile

A new GitHub Actions workflow for building Docker images has been added. This workflow triggers on push events to the main branch. It builds a Docker image and pushes it to a specified repository.

The Dockerfile has also been significantly refactored. The base image is now Node.js 16, and Nginx is used in the production stage to serve the built files. The application is built using npm ci for deterministic builds, and unnecessary environment variables have been removed.

.github/workflows/docker-build.yml

@@ -0,0 +1,21 @@
+name: Docker Build
+
+on:
+  push:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Build and Push Docker Image
+      env:
+        DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
+        DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
+      run: |
+        docker build -t snjax/zeropool-docs:latest .
+        echo $DOCKER_PASSWORD | docker login -u $DOCKER_USERNAME --password-stdin
+        docker push snjax/zeropool-docs:latest:latest

Dockerfile

@@ -1,41 +1,29 @@
-## Base ########################################################################
-# Use a larger node image to do the build for native deps (e.g., gcc, python)
-FROM node:lts as base
-
-# Reduce npm log spam and colour during install within Docker
-ENV NPM_CONFIG_LOGLEVEL=warn
-ENV NPM_CONFIG_COLOR=false
-
-# We'll run the app as the `node` user, so put it in their home directory
-WORKDIR /home/node/app
-# Copy the source code over
-COPY --chown=node:node . /home/node/app/
-
-## Development #################################################################
-# Define a development target that installs devDeps and runs in dev mode
-FROM base as development
-WORKDIR /home/node/app
-# Install (not ci) with dependencies, and for Linux vs. Linux Musl (which we use for -alpine)
-RUN npm install
-# Switch to the node user vs. root
-USER node
-# Expose port 3000
-EXPOSE 3000
-# Start the app in debug mode so we can attach the debugger
-CMD ["npm", "start"]
-
-## Production ##################################################################
-# Also define a production target which doesn't use devDeps
-FROM base as production
-WORKDIR /home/node/app
-COPY --chown=node:node --from=development /home/node/app/node_modules /home/node/app/node_modules
-# Build the Docusaurus app
+# Use Node.js as the base image for building the application
+FROM node:16 AS builder
+
+# Set the working directory inside the container
+WORKDIR /app
+
+# Copy package.json and package-lock.json to the working directory
+COPY package*.json ./
+
+# Install dependencies using npm ci for a deterministic build
+RUN npm ci
+
+# Copy the rest of the project files to the working directory
+COPY . .
+
+# Build the Docusaurus application
 RUN npm run build
-CMD ["npm", "run", "serve_prod"]
-
-## Deploy ######################################################################
-# Use a stable nginx image
-FROM nginx:stable-alpine as deploy
-WORKDIR /home/node/app
-# Copy what we've installed/built from production
-COPY --chown=node:node --from=production /home/node/app/build /usr/share/nginx/html/
+
+# Use Nginx as the base image for the production stage
+FROM nginx:alpine
+
+# Copy the built files from the previous stage to the Nginx html directory
+COPY --from=builder /app/build /usr/share/nginx/html
+
+# Expose port 80 to allow incoming HTTP traffic
+EXPOSE 80
+
+# Run Nginx in the foreground when the container starts
+CMD ["nginx", "-g", "daemon off;"]