feat: add option to specify host via environment variable

Author: ThallesP

src/env.ts

@@ -28,6 +28,7 @@ const schema = Type.Object(
     AUTH_MODE: Type.Optional(
       Type.Enum({ static: 'static', jwt: 'jwt', none: 'none' }),
     ),
+    HOST: Type.String({ default: '::' }),
     JWT_AUDIENCE: Type.Optional(Type.String({ separator: ',' })),
     JWT_ISSUER: Type.Optional(Type.String()),
     JWKS_URL: Type.Optional(Type.String()),

src/index.ts

@@ -23,7 +23,7 @@ closeWithGrace(
   },
 )
 
-app.listen({ host: '0.0.0.0', port: env.get().PORT }, (err) => {
+app.listen({ host: env.get().HOST, port: env.get().PORT }, (err) => {
   if (err) {
     app.log.error(err)
     process.exit(1)