feat(auth): added discord & github authentication methods (#18)

* feat(auth): added discord & github authentication methods

* chore(format): formatted edited files

* docs: add Discord and GitHub OAuth environment variables to README

* feat: add Discord and GitHub OAuth client credentials to environment config

* refactor: migrate social provider types to better-auth package

* feat: return configured social provider names from auth endpoint

* refactor: simplify socialProvidersPlugin by removing nested function and condensing return

turbo.json

@@ -3,28 +3,49 @@
   "ui": "tui",
   "tasks": {
     "topo": {
-      "dependsOn": ["^topo"]
+      "dependsOn": [
+        "^topo"
+      ]
     },
     "build": {
-      "dependsOn": ["^build"],
-      "outputs": [".cache/tsbuildinfo.json", "dist/**"]
+      "dependsOn": [
+        "^build"
+      ],
+      "outputs": [
+        ".cache/tsbuildinfo.json",
+        "dist/**"
+      ]
     },
     "dev": {
-      "dependsOn": ["^dev"],
+      "dependsOn": [
+        "^dev"
+      ],
       "cache": false,
       "persistent": false
     },
     "format": {
-      "outputs": [".cache/.prettiercache"],
+      "outputs": [
+        ".cache/.prettiercache"
+      ],
       "outputLogs": "new-only"
     },
     "lint": {
-      "dependsOn": ["^topo", "^build"],
-      "outputs": [".cache/.eslintcache"]
+      "dependsOn": [
+        "^topo",
+        "^build"
+      ],
+      "outputs": [
+        ".cache/.eslintcache"
+      ]
     },
     "typecheck": {
-      "dependsOn": ["^topo", "^build"],
-      "outputs": [".cache/tsbuildinfo.json"]
+      "dependsOn": [
+        "^topo",
+        "^build"
+      ],
+      "outputs": [
+        ".cache/tsbuildinfo.json"
+      ]
     },
     "clean": {
       "cache": false
@@ -49,6 +70,10 @@
     "POSTGRES_URL",
     "GOOGLE_CLIENT_ID",
     "GOOGLE_CLIENT_SECRET",
+    "DISCORD_CLIENT_ID",
+    "DISCORD_CLIENT_SECRET",
+    "GITHUB_CLIENT_ID",
+    "GITHUB_CLIENT_SECRET",
     "EMAIL_FROM",
     "SMTP_HOST",
     "SMTP_PORT",
@@ -78,4 +103,4 @@
     "VERCEL_URL",
     "npm_lifecycle_event"
   ]
-}
+}