[price-service] add /get_vaa endpoint that serves cache and db vaas (#482)

* add /get_vaa endpoint that serves cache and db vaas

* update env vars

* fix precommit errors

* fix precommit errors

* rename removeExpiredValuesFromVaasCache to runCacheCleanupLoop

* move initialized envOrErr to constructor or func arg

* use setInterval

* update pyth-price-service env vars on tilt devnet

* use undefined instead of null

* use status code

* make web-api an env var

* update env var

* fix precommit

* fix precommit

* fix changes

* remove env vars from tilt-devnet

* address changes

* fix lint issues

* fix linting issues again

* bump package version

* remove unused imports

Author: cctdaniel

third_party/pyth/price-service/.env.sample

@@ -17,3 +17,6 @@ PROM_PORT=8081
 
 # The default is to log with level info.
 #LOG_LEVEL=debug
+
+REMOVE_EXPIRED_VALUES_INTERVAL_SECONDS=60
+CACHE_TTL_SECONDS=300

third_party/pyth/price-service/docker-compose.mainnet.yaml

@@ -37,6 +37,10 @@ services:
       READINESS_SPY_SYNC_TIME_SECONDS: "20"
       READINESS_NUM_LOADED_SYMBOLS: "50"
       LOG_LEVEL: warning
+      DB_API_CLUSTER: pythnet
+      REMOVE_EXPIRED_VALUES_INTERVAL_SECONDS: "60"
+      CACHE_TTL_SECONDS: "300"
+      DB_API_ENDPOINT: "https://web-api.pyth.network"
     healthcheck:
       test:
         [

third_party/pyth/price-service/docker-compose.testnet.yaml

@@ -37,6 +37,10 @@ services:
       READINESS_SPY_SYNC_TIME_SECONDS: "20"
       READINESS_NUM_LOADED_SYMBOLS: "50"
       LOG_LEVEL: warning
+      DB_API_CLUSTER: devnet
+      REMOVE_EXPIRED_VALUES_INTERVAL_SECONDS: "60"
+      CACHE_TTL_SECONDS: "300"
+      DB_API_ENDPOINT: "https://web-api.pyth.network"
     healthcheck:
       test:
         [

third_party/pyth/price-service/package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@pythnetwork/pyth-price-service",
-  "version": "2.2.4",
+  "version": "2.3.0",
   "description": "Pyth Price Service",
   "main": "index.js",
   "scripts": {
@@ -18,6 +18,7 @@
     "@types/jest": "^27.5.0",
     "@types/long": "^4.0.1",
     "@types/node": "^16.6.1",
+    "@types/node-fetch": "^2.6.2",
     "@types/supertest": "^2.0.12",
     "jest": "^28.0.3",
     "prettier": "^2.3.2",
@@ -46,6 +47,7 @@
     "joi": "^17.6.0",
     "lru-cache": "^7.14.1",
     "morgan": "^1.10.0",
+    "node-fetch": "^2.6.1",
     "prom-client": "^14.0.1",
     "response-time": "^2.3.2",
     "winston": "^3.3.3",