Change seeding method of test-db

- Change included_in_block_timestamp field type in test-schema.prisma from BigInt to Decimal as in the original schema
to reflect same properties.
- Remove Synth script in package.json test script and add seed script to populate Prisma test db using Prisma's seeding option.
- This change is made due to the bug in generating numeric data in Synth:
shuttle-hq/synth#272
- Add ts-node as dev dependency to be able to use Prisma seed
- Change test file name to a more descriptive name.

web-app/package.json

@@ -2,15 +2,20 @@
   "name": "nextplus",
   "version": "0.1.0",
   "private": true,
+  "prisma": {
+    "seed": "ts-node --compiler-options {\"module\":\"CommonJS\"} prisma/seed.ts"
+  },
   "scripts": {
     "dev": "next dev",
     "build": "next build",
     "start": "next start",
     "lint": "next lint",
     "docker:up": "docker-compose up -d",
     "docker:down": "docker-compose down",
-    "test": "yarn docker:up && yarn migrate:postgres deploy && synth generate synth/test_db --to postgresql://prisma:prisma@localhost:5433/tests | jq . && dotenv -e .env.test jest -i",
-    "migrate:postgres": "dotenv -e .env.test -- npx prisma migrate dev --schema ./prisma/test-schema.prisma --name postgres-init"
+    "test": "yarn docker:up && yarn migrate:postgres deploy && yarn db:seed && dotenv -e .env.test jest -i ",
+    "migrate:postgres": "dotenv -e .env.test -- npx prisma migrate dev --schema ./prisma/test-schema.prisma --name postgres-init --skip-seed",
+    "migrate:reset": "dotenv -e .env.test -- npx prisma migrate reset --schema ./prisma/test-schema.prisma",
+    "db:seed": "dotenv -e .env.test -- npx prisma db seed"
   },
   "dependencies": {
     "@fortawesome/fontawesome-svg-core": "^1.3.0",
@@ -43,6 +48,7 @@
     "sass": "^1.43.5",
     "tailwindcss": "^3.0.16",
     "ts-jest": "^27.1.3",
+    "ts-node": "^10.7.0",
     "typescript": "^4.6.2"
   }
 }