fix: Add missing relations to Prisma schema (Pet/Booking, Invoice/Booking)

api/Dockerfile

@@ -9,6 +9,19 @@ COPY . .
 RUN npx prisma generate
 RUN npm run build
 
+FROM node:22-alpine AS dev
+
+WORKDIR /app
+
+COPY package.json yarn.lock* ./
+RUN yarn install --frozen-lockfile 2>/dev/null || npm install
+
+COPY . .
+RUN npx prisma generate
+
+EXPOSE 3000
+CMD ["npm", "run", "start:dev"]
+
 FROM node:22-alpine
 
 WORKDIR /app