feat: add NVIDIA API key support and additional env vars

.env.example

@@ -3,6 +3,7 @@ OPENAI_API_KEY=
 ANTHROPIC_API_KEY=
 GOOGLE_API_KEY=
 GROQ_API_KEY=
+NVIDIA_API_KEY=
 
 # HuggingFace
 HF_TOKEN=
@@ -10,3 +11,12 @@ HF_TOKEN=
 # App Settings
 DEBUG=false
 LOG_LEVEL=INFO
+HOST=0.0.0.0
+PORT=8000
+
+# CORS Settings
+CORS_ORIGINS=["http://localhost:5173","http://localhost:3000"]
+
+# Session & Memory
+SESSION_TIMEOUT=3600
+MEMORY_TTL=86400

backend/app/config.py

@@ -43,6 +43,7 @@ class Settings(BaseSettings):
     anthropic_api_key: SecretStr | None = Field(default=None, description="Anthropic API key")
     google_api_key: SecretStr | None = Field(default=None, description="Google AI API key")
     groq_api_key: SecretStr | None = Field(default=None, description="Groq API key")
+    nvidia_api_key: SecretStr | None = Field(default=None, description="NVIDIA API key")
 
     # Model Defaults
     default_model: str = "gpt-4o-mini"
@@ -89,6 +90,8 @@ class Settings(BaseSettings):
             providers.append("google")
         if self.groq_api_key:
             providers.append("groq")
+        if self.nvidia_api_key:
+            providers.append("nvidia")
         return providers