feat: Add multiple Serverless configuration files for modular deployment and update package.json to remove serverless-esbuild

docs/serverless-split-services.md

@@ -0,0 +1,40 @@
+# Split Serverless services (deploy order)
+
+This repo is split into multiple Serverless configs so you can deploy smaller CloudFormation stacks instead of one huge stack.
+
+## Config files
+
+- `serverless.layers.yml`: Prisma layer stack (deploy once per stage)
+- `serverless.host.yml`: Host + PQQ functions (owns the shared HTTP API)
+- `serverless.admin.yml`: Minglar Admin functions (attaches routes to Host HTTP API)
+- `serverless.user.yml`: User functions (attaches routes to Host HTTP API)
+- `serverless.prepopulate.yml`: Prepopulate functions (attaches routes to Host HTTP API)
+
+## Deploy order (per stage)
+
+1) Deploy the layer:
+
+```bash
+npx serverless deploy --config serverless.layers.yml --stage dev
+```
+
+2) Deploy Host (creates the HTTP API + routes for host functions):
+
+```bash
+npx serverless deploy --config serverless.host.yml --stage dev
+```
+
+3) Deploy remaining services (they reuse Host's HTTP API id):
+
+```bash
+npx serverless deploy --config serverless.admin.yml --stage dev
+npx serverless deploy --config serverless.user.yml --stage dev
+npx serverless deploy --config serverless.prepopulate.yml --stage dev
+```
+
+## Deploy a single function
+
+```bash
+npx serverless deploy function --config serverless.host.yml --stage dev -f getHosts
+```
+