Add Nginx infra, docker-compose override, health endpoint and dockeri…

.dockerignore

@@ -0,0 +1,14 @@
+# Ignore build artifacts and env
+__pycache__/
+*.py[cod]
+.env
+.env.*
+redis_data/
+*.log
+
+# Docker
+docker-compose.override.yml
+
+# Editor
+.vscode/
+.idea/

app/main.py

@@ -1,4 +1,5 @@
-from fastapi import FastAPI, Request, HTTPException
+from fastapi import FastAPI, Request, Form, HTTPException
+import asyncio
 import os
 from app.classifier import classify_urgency
 from app.convo_store import ConvoStore
@@ -9,6 +10,10 @@
 app = FastAPI()
 store = ConvoStore(redis_url=settings.REDIS_URL)
 
+@app.get("/health")
+async def health():
+    return {"status": "ok"}
+
 @app.post("/webhook")
 async def webhook(request: Request):
     # Twilio posts form-encoded data for incoming messages

docker-compose.nginx.yml

@@ -0,0 +1,27 @@
+version: '3.8'
+
+services:
+  nginx:
+    image: nginx:1.25-alpine
+    depends_on:
+      - app
+    ports:
+      - "80:80"
+      - "443:443"
+    volumes:
+      - ./infra/nginx/nginx.conf:/etc/nginx/nginx.conf:ro
+      - ./infra/nginx/conf.d:/etc/nginx/conf.d:ro
+      - certbot-etc:/etc/letsencrypt
+      - certbot-var:/var/www/certbot
+    restart: unless-stopped
+
+  certbot:
+    image: certbot/certbot
+    volumes:
+      - certbot-etc:/etc/letsencrypt
+      - certbot-var:/var/www/certbot
+    entrypoint: /bin/sh -c 'trap exit TERM; while :; do sleep 12h & wait $${!}; certbot renew; done'
+
+volumes:
+  certbot-etc:
+  certbot-var:

infra/nginx/conf.d/default.conf

@@ -0,0 +1,59 @@
+upstream app {
+    # Use the docker-compose service name or Kubernetes service name
+    server app:8000;
+}
+
+server {
+    listen 80;
+    server_name _;
+
+    # Allow ACME challenges (certbot) to use /.well-known/acme-challenge/
+    location /.well-known/acme-challenge/ {
+        root /var/www/certbot;
+    }
+
+    # Health endpoint (transparent proxy to app health)
+    location = /health {
+        proxy_pass http://app/health;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_http_version 1.1;
+        proxy_set_header Connection "";
+        proxy_buffering off;
+        proxy_read_timeout 60s;
+        proxy_send_timeout 60s;
+    }
+
+    # Main app (webhook + API)
+    location / {
+        proxy_pass http://app;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+
+        # Forward original request headers (Twilio/Meta signature headers are needed)
+        proxy_set_header X-Original-URI $request_uri;
+        proxy_http_version 1.1;
+        proxy_set_header Connection "";
+
+        # Disable buffering for proxied responses (good for streaming or low-latency)
+        proxy_buffering off;
+
+        # Timeouts (tune as needed)
+        proxy_read_timeout 120s;
+        proxy_send_timeout 120s;
+
+        # Max body size (increase if you accept large media)
+        client_max_body_size 8M;
+
+        # Proxy buffers (tune for throughput)
+        proxy_buffers 8 16k;
+        proxy_buffer_size 32k;
+    }
+
+    # Security headers for TLS (set only when TLS is enabled)
+    # add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
+}

infra/nginx/nginx.conf

@@ -0,0 +1,26 @@
+user  nginx;
+worker_processes  auto;
+error_log  /var/log/nginx/error.log warn;
+pid        /var/run/nginx.pid;
+
+events {
+    worker_connections 1024;
+}
+
+http {
+    include       /etc/nginx/mime.types;
+    default_type  application/octet-stream;
+
+    sendfile        on;
+    tcp_nopush      on;
+    keepalive_timeout  65;
+    server_tokens   off; # hide nginx version in responses
+
+    access_log  /var/log/nginx/access.log;
+    error_log   /var/log/nginx/error.log warn;
+
+    gzip on;
+    gzip_types text/plain application/json application/javascript text/css application/xml;
+
+    include /etc/nginx/conf.d/*.conf;
+}