feat: APISIX gateway with Docker Compose orchestration for stock microservices

- APISIX declarative config with versioned API routes (/api/v1/{service}/...)
- proxy-rewrite for path transformation, CORS global rule, rate limiting (100 req/s)
- Active health checks on all 6 upstream services
- Docker Compose with 11 containers: Redis, PostgreSQL, MongoDB, 6 Python services, APISIX, Next.js frontend
- Environment config via .env.example

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apisix/conf/apisix.yaml

@@ -0,0 +1,298 @@
+# APISIX Standalone mode - declarative configuration
+# All routes, upstreams, and plugins defined here
+
+routes:
+  # === DART Collector (port 8001) ===
+  - id: dart-health
+    uri: /api/v1/dart/health
+    upstream_id: dart
+    plugins:
+      proxy-rewrite:
+        regex_uri: ["^/api/v1/dart/(.*)", "/$1"]
+
+  - id: dart-streams
+    uri: /api/v1/dart/streams
+    upstream_id: dart
+    plugins:
+      proxy-rewrite:
+        regex_uri: ["^/api/v1/dart/(.*)", "/$1"]
+
+  - id: dart-collect
+    uri: /api/v1/dart/collect/*
+    methods: [POST]
+    upstream_id: dart
+    plugins:
+      proxy-rewrite:
+        regex_uri: ["^/api/v1/dart/(.*)", "/$1"]
+
+  # === KIS Collector (port 8002) ===
+  - id: kis-health
+    uri: /api/v1/kis/health
+    upstream_id: kis
+    plugins:
+      proxy-rewrite:
+        regex_uri: ["^/api/v1/kis/(.*)", "/$1"]
+
+  - id: kis-streams
+    uri: /api/v1/kis/streams
+    upstream_id: kis
+    plugins:
+      proxy-rewrite:
+        regex_uri: ["^/api/v1/kis/(.*)", "/$1"]
+
+  - id: kis-stocks-list
+    uri: /api/v1/kis/stocks
+    methods: [GET]
+    upstream_id: kis
+    plugins:
+      proxy-rewrite:
+        regex_uri: ["^/api/v1/kis/(.*)", "/$1"]
+
+  - id: kis-stocks-detail
+    uri: /api/v1/kis/stocks/*
+    methods: [GET]
+    upstream_id: kis
+    plugins:
+      proxy-rewrite:
+        regex_uri: ["^/api/v1/kis/(.*)", "/$1"]
+
+  - id: kis-collect
+    uri: /api/v1/kis/collect/*
+    methods: [POST]
+    upstream_id: kis
+    plugins:
+      proxy-rewrite:
+        regex_uri: ["^/api/v1/kis/(.*)", "/$1"]
+
+  # === News Crawler (port 8003) ===
+  - id: news-health
+    uri: /api/v1/news/health
+    upstream_id: news
+    plugins:
+      proxy-rewrite:
+        regex_uri: ["^/api/v1/news/(.*)", "/$1"]
+
+  - id: news-streams
+    uri: /api/v1/news/streams
+    upstream_id: news
+    plugins:
+      proxy-rewrite:
+        regex_uri: ["^/api/v1/news/(.*)", "/$1"]
+
+  - id: news-collect
+    uri: /api/v1/news/collect/*
+    methods: [POST]
+    upstream_id: news
+    plugins:
+      proxy-rewrite:
+        regex_uri: ["^/api/v1/news/(.*)", "/$1"]
+
+  # === Screener (port 8004) ===
+  - id: screener-health
+    uri: /api/v1/screening/health
+    upstream_id: screener
+    plugins:
+      proxy-rewrite:
+        regex_uri: ["^/api/v1/screening/(.*)", "/$1"]
+
+  - id: screener-streams
+    uri: /api/v1/screening/streams
+    upstream_id: screener
+    plugins:
+      proxy-rewrite:
+        regex_uri: ["^/api/v1/screening/(.*)", "/$1"]
+
+  - id: screener-screen
+    uri: /api/v1/screening/screen
+    methods: [POST]
+    upstream_id: screener
+    plugins:
+      proxy-rewrite:
+        regex_uri: ["^/api/v1/screening/(.*)", "/$1"]
+
+  - id: screener-results
+    uri: /api/v1/screening/results/*
+    upstream_id: screener
+    plugins:
+      proxy-rewrite:
+        regex_uri: ["^/api/v1/screening/(.*)", "/$1"]
+
+  # === Catalyst (port 8005) ===
+  - id: catalyst-health
+    uri: /api/v1/catalyst/health
+    upstream_id: catalyst
+    plugins:
+      proxy-rewrite:
+        regex_uri: ["^/api/v1/catalyst/(.*)", "/$1"]
+
+  - id: catalyst-streams
+    uri: /api/v1/catalyst/streams
+    upstream_id: catalyst
+    plugins:
+      proxy-rewrite:
+        regex_uri: ["^/api/v1/catalyst/(.*)", "/$1"]
+
+  - id: catalyst-detect
+    uri: /api/v1/catalyst/detect
+    methods: [POST]
+    upstream_id: catalyst
+    plugins:
+      proxy-rewrite:
+        regex_uri: ["^/api/v1/catalyst/(.*)", "/$1"]
+
+  - id: catalyst-results
+    uri: /api/v1/catalyst/results/*
+    upstream_id: catalyst
+    plugins:
+      proxy-rewrite:
+        regex_uri: ["^/api/v1/catalyst/(.*)", "/$1"]
+
+  # === LLM Analyzer (port 8006) ===
+  - id: llm-health
+    uri: /api/v1/analysis/health
+    upstream_id: llm
+    plugins:
+      proxy-rewrite:
+        regex_uri: ["^/api/v1/analysis/(.*)", "/$1"]
+
+  - id: llm-streams
+    uri: /api/v1/analysis/streams
+    upstream_id: llm
+    plugins:
+      proxy-rewrite:
+        regex_uri: ["^/api/v1/analysis/(.*)", "/$1"]
+
+  - id: llm-analyze
+    uri: /api/v1/analysis/analyze
+    methods: [POST]
+    upstream_id: llm
+    plugins:
+      proxy-rewrite:
+        regex_uri: ["^/api/v1/analysis/(.*)", "/$1"]
+
+  - id: llm-results
+    uri: /api/v1/analysis/results/*
+    upstream_id: llm
+    plugins:
+      proxy-rewrite:
+        regex_uri: ["^/api/v1/analysis/(.*)", "/$1"]
+
+  # === Aggregated health check (version-independent) ===
+  - id: gateway-health
+    uri: /api/health
+    plugins:
+      serverless-pre-function:
+        phase: rewrite
+        functions:
+          - "return function(conf, ctx) local core = require('apisix.core'); core.response.exit(200, '{\"gateway\":\"ok\",\"version\":\"v1\"}'); end"
+
+upstreams:
+  - id: dart
+    type: roundrobin
+    nodes:
+      "stock-dart-collector:8001": 1
+    checks:
+      active:
+        type: http
+        http_path: /health
+        healthy:
+          interval: 10
+          successes: 2
+        unhealthy:
+          interval: 5
+          http_failures: 3
+
+  - id: kis
+    type: roundrobin
+    nodes:
+      "stock-kis-collector:8002": 1
+    checks:
+      active:
+        type: http
+        http_path: /health
+        healthy:
+          interval: 10
+          successes: 2
+        unhealthy:
+          interval: 5
+          http_failures: 3
+
+  - id: news
+    type: roundrobin
+    nodes:
+      "stock-news-crawler:8003": 1
+    checks:
+      active:
+        type: http
+        http_path: /health
+        healthy:
+          interval: 10
+          successes: 2
+        unhealthy:
+          interval: 5
+          http_failures: 3
+
+  - id: screener
+    type: roundrobin
+    nodes:
+      "stock-screener:8004": 1
+    checks:
+      active:
+        type: http
+        http_path: /health
+        healthy:
+          interval: 10
+          successes: 2
+        unhealthy:
+          interval: 5
+          http_failures: 3
+
+  - id: catalyst
+    type: roundrobin
+    nodes:
+      "stock-catalyst:8005": 1
+    checks:
+      active:
+        type: http
+        http_path: /health
+        healthy:
+          interval: 10
+          successes: 2
+        unhealthy:
+          interval: 5
+          http_failures: 3
+
+  - id: llm
+    type: roundrobin
+    nodes:
+      "stock-llm-analyzer:8006": 1
+    checks:
+      active:
+        type: http
+        http_path: /health
+        healthy:
+          interval: 10
+          successes: 2
+        unhealthy:
+          interval: 5
+          http_failures: 3
+
+global_rules:
+  - id: cors
+    plugins:
+      cors:
+        allow_origins: "*"
+        allow_methods: "GET,POST,PUT,DELETE,OPTIONS"
+        allow_headers: "*"
+        max_age: 3600
+
+  - id: rate-limit
+    plugins:
+      limit-req:
+        rate: 100
+        burst: 50
+        key_type: var
+        key: remote_addr
+        rejected_code: 429
+
+#END

apisix/conf/config.yaml

@@ -0,0 +1,15 @@
+# APISIX configuration
+apisix:
+  node_listen: 9080
+  enable_admin: false
+
+deployment:
+  role: data_plane
+  role_data_plane:
+    config_provider: yaml
+
+plugin_attr:
+  prometheus:
+    export_addr:
+      ip: 0.0.0.0
+      port: 9091