refactor(docker): move Dockerfile to root for simpler Dokploy setup

Dockerfile

@@ -0,0 +1,39 @@
+# syntax=docker/dockerfile:1.7
+
+FROM oven/bun:1.3 AS deps
+WORKDIR /app
+COPY package.json bun.lock ./
+COPY apps/backend/package.json apps/backend/
+COPY apps/frontend/package.json apps/frontend/
+COPY packages/api-contract/package.json packages/api-contract/
+RUN bun install --frozen-lockfile
+
+FROM deps AS build
+WORKDIR /app
+COPY . .
+
+ARG VITE_API_BASE_URL
+ARG VITE_SUPABASE_URL
+ARG VITE_SUPABASE_ANON_KEY
+ENV VITE_API_BASE_URL=${VITE_API_BASE_URL}
+ENV VITE_SUPABASE_URL=${VITE_SUPABASE_URL}
+ENV VITE_SUPABASE_ANON_KEY=${VITE_SUPABASE_ANON_KEY}
+
+ARG DATABASE_URL=postgresql://placeholder:placeholder@placeholder:5432/placeholder
+ENV DATABASE_URL=${DATABASE_URL}
+
+RUN bun run build:frontend
+RUN bun --cwd apps/backend prisma generate
+
+FROM deps AS runner
+WORKDIR /app
+ENV NODE_ENV=production HOST=0.0.0.0 PORT=3000
+
+COPY --from=build /app/node_modules ./node_modules
+COPY --from=build /app/apps/backend ./apps/backend
+COPY --from=build /app/packages ./packages
+COPY package.json ./
+
+WORKDIR /app/apps/backend
+EXPOSE 3000
+CMD ["sh", "-lc", "bun run prisma migrate deploy && bun src/server.ts"]