refactor(server): add and start enforcing stricter ts config

Add eslint rules with type-checking, add alternative strict tsconfig
which enables typechecking plain JS; currently still many lint errors.

Author: ethanwu10

server/.eslintrc.js

@@ -16,7 +16,8 @@ module.exports = {
   overrides: [{
     files: ['*.ts'],
     extends: [
-      'plugin:@typescript-eslint/recommended'
+      'plugin:@typescript-eslint/recommended',
+      'plugin:@typescript-eslint/recommended-requiring-type-checking'
     ],
     plugins: [
       '@typescript-eslint'

yarn.lock

@@ -11457,7 +11457,12 @@ [email protected]:
   resolved "https://registry.yarnpkg.com/strip-json-comments/-/strip-json-comments-3.0.1.tgz#85713975a91fb87bf1b305cca77395e40d2a64a7"
   integrity sha512-VTyMAUfdm047mwKl+u79WIdrZxtFtn+nBxHeb844XBQ9uMNTuTHdx2hc5RiAJYqwTj3wc/xe5HLSdJSkJ+WfZw==
 
-strip-json-comments@^3.1.0, strip-json-comments@^3.1.1:
+strip-json-comments@^3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/strip-json-comments/-/strip-json-comments-3.1.0.tgz#7638d31422129ecf4457440009fba03f9f9ac180"
+  integrity sha512-e6/d0eBu7gHtdCqFt0xJr642LdToM5/cN4Qb9DbHjVx1CP5RyeM+zH7pbecEmDv/lBqb0QH+6Uqq75rxFPkM0w==
+
+strip-json-comments@^3.1.1:
   version "3.1.1"
   resolved "https://registry.yarnpkg.com/strip-json-comments/-/strip-json-comments-3.1.1.tgz#31f1281b3832630434831c310c01cccda8cbe006"
   integrity sha512-6fPc+R4ihwqP6N/aIv2f1gMH8lOVtWQHoqC4yK6oSDVVocumAsfCqjkXnqiYMhmMwS/mEHLp7Vehlt3ql6lEig==