Added API for externalAPI, added env for clients

src/core/config/config.module.ts

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+import { Module } from "@nestjs/common";
+import { ConfigModule } from "@nestjs/config";
+import { validate } from "./config.validation";
+
+@Module({
+  imports: [
+    ConfigModule.forRoot({
+      isGlobal: true,
+      expandVariables: true,
+      validate,
+    }),
+  ],
+})
+export class AppConfigModule {}

src/core/config/config.schema.ts

@@ -0,0 +1,75 @@
+import {
+  IsBooleanString,
+  IsEnum,
+  IsNumber,
+  IsPositive,
+  IsString,
+  IsUrl,
+  Matches,
+  Max,
+  Min,
+  MinLength,
+} from "class-validator";
+import { StringValue } from "ms";
+
+export enum Environment {
+  Development = "development",
+  Production = "production",
+}
+
+export class EnvironmentVariables {
+  @IsEnum(Environment, {
+    message: "NODE_ENV should be development or production",
+  })
+  NODE_ENV: Environment;
+  // --------------------------------------------------------- //
+  @IsNumber(
+    {
+      allowNaN: false,
+      allowInfinity: false,
+    },
+    {
+      message: "PORT must be a valid number",
+    },
+  )
+  @IsPositive({ message: "PORT must be positive" })
+  @Min(0, { message: "PORT must be between 0 and 65535" })
+  @Max(65535, { message: "PORT must be between 0 and 65535" })
+  PORT: number;
+  // --------------------------------------------------------- //
+  @IsString({ message: "MONGO_URI must be string" })
+  @IsUrl(
+    {
+      require_tld: false,
+      protocols: ["mongodb", "mongodb+srv"],
+    },
+    {
+      message: "MONGO_URI must be in the correct format (mongodb://...)",
+    },
+  )
+  MONGO_URI: string;
+  // --------------------------------------------------------- //
+  @IsBooleanString({ message: "MONGO_TLS must be boolean" })
+  MONGO_TLS: string;
+  // --------------------------------------------------------- //
+  @IsBooleanString({ message: "MONGO_TLS_ALLOW_INVALID_CERTS must be boolean" })
+  MONGO_TLS_ALLOW_INVALID_CERTS: string;
+  // --------------------------------------------------------- //
+  @IsString({ message: "JWT_SECRET must be string" })
+  @MinLength(32, {
+    message: "JWT_SECRET must be at least 32 characters",
+  })
+  JWT_SECRET: string;
+  // --------------------------------------------------------- //
+  @Matches(/^\d+(ms|s|m|h|d|w|y)$/, {
+    message: "JWT_EXPIRY must be in the correct format",
+  })
+  JWT_EXPIRY: StringValue;
+  // --------------------------------------------------------- //
+  // @IsString({ message: "HASH_PEPPER must be string" })
+  // @MinLength(32, {
+  //   message: "HASH_PEPPER must be at least 32 characters",
+  // })
+  // HASH_PEPPER: string;
+  // --------------------------------------------------------- //
+}

src/core/config/config.validation.ts

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+import { plainToInstance } from "class-transformer";
+import { validateSync } from "class-validator";
+import { EnvironmentVariables } from "./config.schema";
+
+export function validate(config: Record<string, unknown>) {
+  const validatedConfig = plainToInstance(EnvironmentVariables, config, {
+    enableImplicitConversion: true,
+  });
+
+  const errors = validateSync(validatedConfig, {
+    skipMissingProperties: false,
+  });
+
+  if (errors.length > 0) {
+    const messages = errors
+      .flatMap((error) => Object.values(error.constraints ?? {}))
+      .join("\n");
+
+    throw new Error(`Environment validation failed:\n${messages}`);
+  }
+
+  return validatedConfig;
+}

src/core/database/database.module.ts

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+import { Module } from "@nestjs/common";
+import { ConfigService } from "@nestjs/config";
+import { MongooseModule } from "@nestjs/mongoose";
+
+@Module({
+  imports: [
+    MongooseModule.forRootAsync({
+      inject: [ConfigService],
+      useFactory: (configService: ConfigService) => ({
+        uri: configService.get<string>("MONGO_URI"),
+        tls: configService.get<string>("MONGO_TLS") === "true",
+        tlsAllowInvalidCertificates:
+          configService.get<string>("MONGO_TLS_ALLOW_INVALID_CERTS") === "true",
+        autoIndex: configService.get<string>("NODE_ENV") !== "production",
+      }),
+    }),
+  ],
+})
+export class DatabaseModule {}