style: add object-shorthand rule, apply fixes

This rule ensures
```js
const obj = {
  foo: 'bar',
  baz,
}
```

Instead of allowing
```js
const obj = {
  foo: 'bar',
  baz: baz,
}
```

.eslintrc.js

@@ -39,6 +39,7 @@ module.exports = {
     // Brace/parenthesis spacing rules
     'array-bracket-spacing': ['error', 'never'],
     'object-curly-spacing': ['error', 'always', { objectsInObjects: false }],
+    'object-shorthand': ['error', 'always', { avoidQuotes: true }],
     'space-in-parens': ['error', 'never'],
 
     // Newline padding rules

server/lib/db.ts

@@ -46,7 +46,7 @@ export class Database {
         username: env.DB_USER,
         password: env.DB_PASSWORD,
         host: env.DB_HOST,
-        database: database,
+        database,
         ...commonOptions,
       });
     }