refactor(db): replace DATABASE_URL with individual POSTGRES_* env vars

Eliminates duplicate configuration by building the connection URL
from POSTGRES_USER, POSTGRES_PASSWORD, POSTGRES_DB, POSTGRES_HOST,
and POSTGRES_PORT instead of requiring a separate DATABASE_URL.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

1 files changed, 5 insertions, 8 deletions

diff --git a/src/server/db/index.ts b/src/server/db/index.ts
index 0e69fad..4826710 100644
--- a/src/server/db/index.ts
+++ b/src/server/db/index.ts
@@ -2,15 +2,12 @@ import { drizzle } from "drizzle-orm/node-postgres";
 import * as schema from "./schema.js";
 import * as schemaCrdt from "./schema-crdt.js";
 
-const databaseUrl = process.env.DATABASE_URL;
+const { POSTGRES_USER, POSTGRES_PASSWORD, POSTGRES_DB, POSTGRES_HOST, POSTGRES_PORT } = process.env;
 
-if (!databaseUrl) {
-	throw new Error("DATABASE_URL environment variable is not set");
-}
-
-export const db = drizzle(databaseUrl, {
-	schema: { ...schema, ...schemaCrdt },
-});
+export const db = drizzle(
+	`postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@${POSTGRES_HOST}:${POSTGRES_PORT}/${POSTGRES_DB}`,
+	{ schema: { ...schema, ...schemaCrdt } },
+);
 
 export * from "./schema.js";
 export * from "./schema-crdt.js";