cors: add self hostable cors proxy

cors-proxy/Dockerfile

@@ -0,0 +1,19 @@
+FROM oven/bun:1.3.5-slim
+
+RUN mkdir -p /home/bun/app && chown -R bun:bun /home/bun/app
+
+WORKDIR /home/bun/app
+
+USER bun
+
+COPY --chown=bun:bun package.json bun.lock .
+
+RUN bun install --frozen-lockfile
+
+COPY --chown=bun:bun . .
+
+RUN bun run build
+
+EXPOSE 3000
+
+CMD ["bun", "run", "start"]