Add docker/Dockerfile

docker/Dockerfile

@@ -0,0 +1,31 @@
+# ----- Stage 1: Build Angular SSR App -----
+FROM node:22-alpine AS build
+WORKDIR /app
+
+# Copy package files
+COPY package.json package-lock.json ./
+
+# Install dependencies (cached if package files haven't changed)
+RUN npm ci
+
+# Copy the rest of the code (including the environment.ts injected by Gitea Actions)
+COPY . .
+
+# Build the Angular app for production
+RUN npm run build
+
+# ----- Stage 2: Serve SSR App -----
+FROM node:22-alpine AS final
+
+WORKDIR /app
+
+# Copy the built assets from the build stage.
+# Your angular.json defines the base output path as "preview"
+COPY --from=build /app/preview ./preview
+
+# Expose the standard Angular SSR port
+EXPOSE 4000
+
+# Start the Node.js SSR server
+# Note: Angular 17+ SSR usually outputs the server file to <base>/server/server.mjs
+CMD ["node", "preview/server/server.mjs"]