Add Docker files

.docker/Dockerfile

@@ -0,0 +1,12 @@
+FROM codeberg.org/korbs/bun:${ARCH} AS runtime
+WORKDIR /app
+
+COPY . .
+
+RUN bun install
+RUN bun run build
+
+ENV HOST=0.0.0.0
+ENV PORT=4321
+EXPOSE 4321
+CMD bun ./dist/server/entry.mjs

.docker/docker-compose.yml

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+services:
+  nginx:
+    image: docker.io/library/demo-thingie
+    restart: unless-stopped
+    ports:
+      - 6003:4321