chore: update dockerfile, readme, etc

Dockerfile

@@ -1,34 +1,28 @@
-FROM node:20-slim AS base
+FROM node:20-slim AS frontend
 WORKDIR /app
 
 ENV PNPM_HOME="/pnpm"
 ENV PATH="$PNPM_HOME:$PATH"
 RUN corepack enable
 
-FROM base AS frontend
 COPY package.json pnpm-lock.yaml ./
 RUN --mount=type=cache,id=pnpm,target=/pnpm/store pnpm install --frozen-lockfile
 
 COPY . .
 RUN pnpm run build
 
-FROM base AS backend-deps
-COPY backend/package.json backend/pnpm-lock.yaml ./
-RUN --mount=type=cache,id=pnpm,target=/pnpm/store pnpm install -prod --frozen-lockfile
-COPY backend .
-
-FROM oven/bun:alpine AS backend
-WORKDIR /app
-COPY --from=backend-deps /app .
-RUN bun run build
-
-FROM oven/bun:alpine
+FROM golang:1.22.5 AS backend
 WORKDIR /app
 
-ENV NODE_ENV=production
-ENV DIST_ROOT=./dist
+COPY backend/go.mod backend/go.sum ./
+RUN go mod download
 
-COPY --from=frontend /app/dist /app/dist
-COPY --from=backend /app/dist /app
+COPY backend/ ./
+COPY --from=frontend /app/dist ./ui
+RUN make
 
-ENTRYPOINT [ "bun" , "run", "main.js" ]
+FROM scratch
+
+COPY --from=backend /app/main /bin/main
+
+CMD [ "/bin/main" ]