feat: initial ImportEx API setup with Hono + Drizzle + PostgreSQL

- Hono server with CORS and logging middleware
- Drizzle ORM with PostgreSQL schema (users table)
- Environment config with Zod validation
- Dockerfile for production deployment
- Gitea Actions workflows for dev/main deployment to Coolify
- Health check route

Dockerfile

@@ -0,0 +1,22 @@
+FROM oven/bun:1 AS base
+WORKDIR /app
+
+FROM base AS install
+COPY package.json bun.lockb ./
+RUN bun install --frozen-lockfile
+
+FROM base AS build
+COPY --from=install /app/node_modules ./node_modules
+COPY . .
+RUN bun run typecheck
+
+FROM base AS release
+COPY --from=build /app/node_modules ./node_modules
+COPY --from=build /app/src ./src
+COPY --from=build /app/drizzle.config.ts ./
+COPY --from=build /app/package.json ./
+
+ENV NODE_ENV=production
+EXPOSE 3000
+
+CMD ["bun", "run", "src/server.ts"]