build: multi-stage Dockerfile with yq build step

Dockerfile

@@ -1,5 +1,17 @@
+FROM alpine:3.21 AS builder
+
+RUN apk add --no-cache bash yq coreutils findutils
+
+WORKDIR /src
+COPY . .
+
+RUN chmod +x build.sh render.sh nginx/generate-nginx.sh && \
+    ./build.sh
+
 FROM nginx:alpine
-COPY build/ /usr/share/nginx/html/
-COPY nginx/nginx.conf /etc/nginx/nginx.conf
+
+COPY --from=builder /src/build/ /usr/share/nginx/html/
+COPY --from=builder /src/nginx/nginx.conf /etc/nginx/nginx.conf
+
 RUN nginx -t
 EXPOSE 80