add env example

.env.example

@@ -0,0 +1,14 @@
+# Server
+PORT=8787
+HOST=0.0.0.0
+
+# Set this in prod
+# ADMIN_TOKEN=change_me_to_a_long_random_string
+
+# Providers
+# OPENAI_API_KEY=
+# ANTHROPIC_API_KEY=
+# XAI_API_KEY=
+
+# Prisma (SQLite dev)
+DATABASE_URL="file:./dev.db"