fix: add missing COPY tsconfig.json to builder stage

tsc --project . fails without tsconfig.json in the builder stage.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

Dockerfile

@@ -14,6 +14,7 @@ FROM deps AS builder
 RUN mkdir -p /home/node/.cache/node/corepack
 COPY packages/ packages/
 COPY src/ src/
+COPY tsconfig.json ./
 RUN pnpm --filter @groombook/types build && \
     pnpm --filter @groombook/db build && \
     pnpm build