feat: docker build and gitea workflow

Dockerfile

@@ -0,0 +1,19 @@
+FROM node:22-alpine AS base
+RUN corepack enable
+
+FROM base AS deps
+WORKDIR /app
+COPY package.json pnpm-lock.yaml ./
+RUN pnpm install --frozen-lockfile
+
+FROM base AS build
+WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+RUN pnpm build
+
+FROM base AS runtime
+WORKDIR /app
+COPY --from=build /app/.output ./.output
+EXPOSE 3000
+CMD ["node", ".output/server/index.mjs"]