add docker

apps/backend/Dockerfile

@@ -0,0 +1,32 @@
+FROM --platform=linux/amd64 oven/bun:1.0.5-slim
+
+ARG DATABASE_URL
+ENV DATABASE_URL=$DATABASE_URL
+
+ENV PORT=3000
+
+ENV NODE_ENV=production
+
+# For prisma
+ARG NODE_VERSION=18
+RUN apt update \
+    && apt install -y curl \
+    && curl -L https://raw.githubusercontent.com/tj/n/master/bin/n -o n \
+    && bash n $NODE_VERSION \
+    && rm n \
+    && npm install -g n
+
+WORKDIR /app
+COPY package.json package.json
+COPY apps/backend/package.json apps/backend/package.json
+COPY packages/types/package.json packages/types/package.json
+COPY bun.lockb bun.lockb
+RUN bun install
+COPY . .
+
+WORKDIR /app/apps/backend
+RUN bunx prisma generate
+
+EXPOSE ${PORT}
+CMD ["bun", "start"]
+