build: build and minify css when creating docker image

Dockerfile

@@ -1,3 +1,12 @@
+FROM oven/bun:1-alpine AS css-builder
+WORKDIR /temp
+COPY package.json bun.lockb ./
+RUN bun install --frozen-lockfile
+
+COPY tailwind.config.js .
+COPY src ./src
+RUN bunx tailwindcss -i ./src/style.css -o ./out.css --minify
+
 FROM --platform=$TARGETPLATFORM rust:1.80-alpine AS build
 ARG TARGETPLATFORM
 
@@ -14,6 +23,7 @@ FROM scratch
 
 WORKDIR /app
 COPY ./static static
+COPY --from=css-builder /temp/out.css ./static/style.css
 COPY --from=build /usr/src/vesta/target/release/vesta /app/vesta
 
 CMD ["/app/vesta"]