feat(docker): add Dockerfile and CI workflow for containerization

* Introduced a `Dockerfile` for building and running the application in a container.
* Added a CI workflow in `.gitea/workflows/ci.yaml` to automate testing and image pushing on main branch pushes.
* Configured Nginx for serving the application with health checks and caching strategies.

4 files changed, 220 insertions, 0 deletions

diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..c11dd48
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,12 @@
+node_modules
+.git
+.github
+.vscode
+.netlify
+.astro
+README.md
+.gitignore
+.env*
+*.log
+Dockerfile
+.dockerignore
diff --git a/.gitea/workflows/ci.yaml b/.gitea/workflows/ci.yaml
new file mode 100644
index 0000000..94b2b10
--- /dev/null
+++ b/.gitea/workflows/ci.yaml
@@ -0,0 +1,48 @@
+name: CI
+
+# For all pushes to the main branch run the tests and push the image to the
+# GitHub registry under an edge tag so we can use it for the nightly
+# integration tests
+on: [push]
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      # GitHub Actions do not automatically checkout your projects. If you need the code
+      # you need to check it out.
+      - name: Checkout
+        uses: https://git.stdv.de/Mirrors/[email protected]
+      - name: Prepare
+        id: prep
+        run: |
+          DOCKER_IMAGE=git.stdv.de/saturneric/gpgfrontend-manual
+          VERSION=$(git rev-parse --short HEAD)
+          # Add timestamp for better versioning
+          TIMESTAMP=$(date +%Y%m%d%H%M%S)
+          TAGS="${DOCKER_IMAGE}:${VERSION}"
+          TAGS="$TAGS,${DOCKER_IMAGE}:${VERSION}-${TIMESTAMP}"
+          TAGS="$TAGS,${DOCKER_IMAGE}:latest"
+          echo "tags=${TAGS}" >> $GITHUB_OUTPUT
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: https://git.stdv.de/Mirrors/setup-buildx-action@v2
+
+      - name: Login to Gitea
+        if: github.event_name != 'pull_request'
+        uses: https://git.stdv.de/Mirrors/login-action@v2
+        with:
+          registry: git.stdv.de
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Build & Push
+        id: docker_build
+        uses: https://git.stdv.de/Mirrors/build-push-action@v4
+        with:
+          builder: ${{ steps.buildx.outputs.name }}
+          context: .
+          file: ./Dockerfile
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.prep.outputs.tags }}
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..fe12b35
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,57 @@
+# Build stage
+FROM node:lts-alpine AS build
+
+# Set working directory
+WORKDIR /app
+
+# Copy package files
+COPY package*.json ./
+
+# Install dependencies with npm ci for faster, reliable builds
+RUN npm ci --only=production
+
+# Copy source code
+COPY . .
+
+# Build the application
+RUN npm run build
+
+# Runtime stage
+FROM nginx:alpine AS runtime
+
+# Install dumb-init for proper signal handling
+RUN apk add --no-cache dumb-init
+
+# Create nginx user and group
+RUN addgroup -g 1001 -S nginx && \
+  adduser -S -D -H -u 1001 -h /var/cache/nginx -s /sbin/nologin -G nginx -g nginx nginx
+
+# Copy nginx configuration
+COPY ./nginx/nginx.conf /etc/nginx/nginx.conf
+
+# Copy built application from build stage
+COPY --from=build /app/dist /usr/share/nginx/html
+
+# Set proper permissions
+RUN chown -R nginx:nginx /usr/share/nginx/html && \
+  chown -R nginx:nginx /var/cache/nginx && \
+  chown -R nginx:nginx /var/log/nginx && \
+  chown -R nginx:nginx /etc/nginx/conf.d
+
+# Create nginx PID directory
+RUN mkdir -p /var/run/nginx && \
+  chown -R nginx:nginx /var/run/nginx
+
+# Switch to non-root user
+USER nginx
+
+# Expose port
+EXPOSE 8080
+
+# Add health check
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD wget --no-verbose --tries=1 --spider http://localhost:8080/health || exit 1
+
+# Use dumb-init to handle signals properly
+ENTRYPOINT ["dumb-init", "--"]
+CMD ["nginx", "-g", "daemon off;"]
\ No newline at end of file
diff --git a/nginx/nginx.conf b/nginx/nginx.conf
new file mode 100644
index 0000000..1970845
--- /dev/null
+++ b/nginx/nginx.conf
@@ -0,0 +1,103 @@
+user nginx;
+worker_processes auto;
+error_log /var/log/nginx/error.log notice;
+pid /var/run/nginx.pid;
+
+events {
+    worker_connections 1024;
+}
+
+http {
+    include /etc/nginx/mime.types;
+    default_type application/octet-stream;
+
+    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
+                    '$status $body_bytes_sent "$http_referer" '
+                    '"$http_user_agent" "$http_x_forwarded_for"';
+
+    access_log /var/log/nginx/access.log main;
+
+    sendfile on;
+    tcp_nopush on;
+    tcp_nodelay on;
+    keepalive_timeout 65;
+    types_hash_max_size 2048;
+
+    # Security headers
+    add_header X-Frame-Options "SAMEORIGIN" always;
+    add_header X-Content-Type-Options "nosniff" always;
+    add_header X-XSS-Protection "1; mode=block" always;
+    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
+
+    # Gzip compression
+    gzip on;
+    gzip_vary on;
+    gzip_min_length 1024;
+    gzip_proxied any;
+    gzip_comp_level 6;
+    gzip_types
+        application/atom+xml
+        application/geo+json
+        application/javascript
+        application/x-javascript
+        application/json
+        application/ld+json
+        application/manifest+json
+        application/rdf+xml
+        application/rss+xml
+        application/xhtml+xml
+        application/xml
+        font/eot
+        font/otf
+        font/ttf
+        image/svg+xml
+        text/css
+        text/javascript
+        text/plain
+        text/xml;
+
+    server {
+        listen 8080;
+        server_name localhost;
+        root /usr/share/nginx/html;
+        index index.html;
+
+        # Security configurations
+        server_tokens off;
+        
+        # Cache static assets
+        location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
+            expires 1y;
+            add_header Cache-Control "public, immutable";
+            add_header X-Frame-Options "SAMEORIGIN" always;
+            add_header X-Content-Type-Options "nosniff" always;
+        }
+
+        # Handle HTML files with shorter cache
+        location ~* \.html$ {
+            expires 1h;
+            add_header Cache-Control "public, no-transform";
+            add_header X-Frame-Options "SAMEORIGIN" always;
+            add_header X-Content-Type-Options "nosniff" always;
+        }
+
+        # Handle root and fallback to index.html (SPA support)
+        location / {
+            try_files $uri $uri/ /index.html;
+            add_header X-Frame-Options "SAMEORIGIN" always;
+            add_header X-Content-Type-Options "nosniff" always;
+        }
+
+        # Health check endpoint
+        location /health {
+            access_log off;
+            return 200 "healthy\n";
+            add_header Content-Type text/plain;
+        }
+
+        # Block access to hidden files
+        location ~ /\. {
+            deny all;
+        }
+    }
+}