feat(coingecko.service): Add `pro` API key support

Create new environment variable `COINGECKO_API_KEY_PRO`.

apps/api/src/services/configuration/configuration.service.ts

@@ -16,6 +16,7 @@ export class ConfigurationService {
       CACHE_QUOTES_TTL: num({ default: 1 }),
       CACHE_TTL: num({ default: 1 }),
       COINGECKO_API_KEY_DEMO: str({ default: '' }),
+      COINGECKO_API_KEY_PRO: str({ default: '' }),
       DATA_SOURCE_EXCHANGE_RATES: str({ default: DataSource.YAHOO }),
       DATA_SOURCE_IMPORT: str({ default: DataSource.YAHOO }),
       DATA_SOURCES: json({

apps/api/src/services/data-provider/coingecko/coingecko.service.ts

@@ -22,7 +22,7 @@ import got, { Headers } from 'got';
 @Injectable()
 export class CoinGeckoService implements DataProviderInterface {
   private headers: Headers = {};
-  private readonly URL = 'https://api.coingecko.com/api/v3';
+  private readonly URL: string = 'https://api.coingecko.com/api/v3';
 
   public constructor(
     private readonly configurationService: ConfigurationService
@@ -30,6 +30,11 @@ export class CoinGeckoService implements DataProviderInterface {
     if (this.configurationService.get('COINGECKO_API_KEY_DEMO')) {
       this.headers['x-cg-demo-api-key'] = this.configurationService.get('COINGECKO_API_KEY_DEMO');
     }
+
+    if (this.configurationService.get('COINGECKO_API_KEY_PRO')) {
+      this.headers['x-cg-pro-api-key'] = this.configurationService.get('COINGECKO_API_KEY_PRO');
+      this.URL = 'https://pro-api.coingecko.com/api/v3';
+    }
   }
 
   public canHandle(symbol: string) {

apps/api/src/services/interfaces/environment.interface.ts

@@ -7,6 +7,7 @@ export interface Environment extends CleanedEnvAccessors {
   CACHE_QUOTES_TTL: number;
   CACHE_TTL: number;
   COINGECKO_API_KEY_DEMO: string;
+  COINGECKO_API_KEY_PRO: string;
   DATA_SOURCE_EXCHANGE_RATES: string;
   DATA_SOURCE_IMPORT: string;
   DATA_SOURCES: string[];