Add Docker, Nginx, and Gitea workflow configuration

Dockerfile

@@ -0,0 +1,36 @@
+# Stage 1: Build the application
+FROM node:lts-alpine as build-stage
+
+# Set working directory
+WORKDIR /app
+
+# Copy package files first to leverage Docker cache
+COPY package*.json ./
+
+# Install dependencies
+RUN npm install
+
+# Copy the rest of the application code
+COPY . .
+
+# Build the application
+RUN npm run build
+
+# Stage 2: Serve the application with Nginx
+FROM nginx:stable-alpine as production-stage
+
+# Copy the built artifacts from the build stage
+COPY --from=build-stage /app/dist /usr/share/nginx/html
+
+# Copy custom Nginx configuration
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+# Expose port 80
+EXPOSE 80
+
+# Healthcheck to ensure Nginx is running and serving
+HEALTHCHECK --interval=30s --timeout=3s \
+  CMD wget --quiet --tries=1 --spider http://localhost/health || exit 1
+
+# Start Nginx
+CMD ["nginx", "-g", "daemon off;"]