Initial commit: EGBE chatbot template

Stripped from vercel/chatbot (Apache 2.0):
- Dropped @vercel/* packages and AI Gateway
- Removed artifacts feature (code/text/sheet/image side panel)
- Switched AI provider to @ai-sdk/openai-compatible -> EGBE LiteLLM
- Replaced Vercel Blob upload with data URLs
- Dropped Redis resumable streams and rate limiter (in-memory now)
- Added Dockerfile (Next.js standalone) + entrypoint that runs migrations
- Wired DATABASE_URL, EGBE_AI_API_URL/KEY, NEXT_PUBLIC_BASE_URL for app-deploy.sh

lib/db/migrations/0000_bouncy_payback.sql

@@ -0,0 +1,59 @@
+CREATE TABLE IF NOT EXISTS "Chat" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"createdAt" timestamp NOT NULL,
+	"title" text NOT NULL,
+	"userId" uuid NOT NULL,
+	"visibility" varchar DEFAULT 'private' NOT NULL
+);
+--> statement-breakpoint
+CREATE TABLE IF NOT EXISTS "Message_v2" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"chatId" uuid NOT NULL,
+	"role" varchar NOT NULL,
+	"parts" json NOT NULL,
+	"attachments" json NOT NULL,
+	"createdAt" timestamp NOT NULL
+);
+--> statement-breakpoint
+CREATE TABLE IF NOT EXISTS "User" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"email" varchar(64) NOT NULL,
+	"password" varchar(64),
+	"name" text,
+	"emailVerified" boolean DEFAULT false NOT NULL,
+	"image" text,
+	"isAnonymous" boolean DEFAULT false NOT NULL,
+	"createdAt" timestamp DEFAULT now() NOT NULL,
+	"updatedAt" timestamp DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+CREATE TABLE IF NOT EXISTS "Vote_v2" (
+	"chatId" uuid NOT NULL,
+	"messageId" uuid NOT NULL,
+	"isUpvoted" boolean NOT NULL,
+	CONSTRAINT "Vote_v2_chatId_messageId_pk" PRIMARY KEY("chatId","messageId")
+);
+--> statement-breakpoint
+DO $$ BEGIN
+ ALTER TABLE "Chat" ADD CONSTRAINT "Chat_userId_User_id_fk" FOREIGN KEY ("userId") REFERENCES "public"."User"("id") ON DELETE no action ON UPDATE no action;
+EXCEPTION
+ WHEN duplicate_object THEN null;
+END $$;
+--> statement-breakpoint
+DO $$ BEGIN
+ ALTER TABLE "Message_v2" ADD CONSTRAINT "Message_v2_chatId_Chat_id_fk" FOREIGN KEY ("chatId") REFERENCES "public"."Chat"("id") ON DELETE no action ON UPDATE no action;
+EXCEPTION
+ WHEN duplicate_object THEN null;
+END $$;
+--> statement-breakpoint
+DO $$ BEGIN
+ ALTER TABLE "Vote_v2" ADD CONSTRAINT "Vote_v2_chatId_Chat_id_fk" FOREIGN KEY ("chatId") REFERENCES "public"."Chat"("id") ON DELETE no action ON UPDATE no action;
+EXCEPTION
+ WHEN duplicate_object THEN null;
+END $$;
+--> statement-breakpoint
+DO $$ BEGIN
+ ALTER TABLE "Vote_v2" ADD CONSTRAINT "Vote_v2_messageId_Message_v2_id_fk" FOREIGN KEY ("messageId") REFERENCES "public"."Message_v2"("id") ON DELETE no action ON UPDATE no action;
+EXCEPTION
+ WHEN duplicate_object THEN null;
+END $$;