Add Dockerfile

docfx/Dockerfile

@@ -0,0 +1,50 @@
+# Stage 1: Build DocFX site
+FROM mcr.microsoft.com/dotnet/sdk:10.0-alpine AS docfx-build
+
+# Create non-root user
+RUN addgroup -S docfx && adduser -S docfx -G docfx
+
+# Switch early
+USER docfx
+ENV HOME=/home/docfx
+ENV PATH="$PATH:/home/docfx/.dotnet/tools"
+
+WORKDIR /workspace
+
+# Install DocFX as docfx user
+RUN dotnet tool install -g docfx
+
+# Copy sources
+COPY --chown=docfx:docfx docfx ./docfx
+COPY --chown=docfx:docfx src ./src
+
+WORKDIR /workspace/docfx
+RUN docfx docfx_project/docfx.json
+
+# Stage 2: Runtime (Nginx)
+FROM nginx:alpine
+
+# Create non-root user
+RUN addgroup -S nginx-user && adduser -S nginx-user -G nginx-user
+
+# Prepare runtime directories
+RUN mkdir -p /var/cache/nginx /var/run \
+    && chown -R nginx-user:nginx-user /var/cache/nginx /var/run
+
+# Remove default content and config
+RUN rm -rf /usr/share/nginx/html/* \
+    && rm /etc/nginx/conf.d/default.conf
+
+# Copy static site
+COPY --from=docfx-build \
+     --chown=nginx-user:nginx-user \
+     /workspace/docfx/docfx_project/_site \
+     /usr/share/nginx/html
+
+# Provide nginx config
+COPY docfx/nginx.conf /etc/nginx/nginx.conf
+
+USER nginx-user
+
+EXPOSE 8080
+CMD ["nginx", "-g", "daemon off;"]