site: standardize building command (#5380)

site/Makefile

@@ -9,7 +9,7 @@ sapper:
 	@echo "\n~> updating template & contributors list"
 	@npm run update
 	@echo "\n~> building Sapper app"
-	@npm run sapper
+	@npm run build
 
 
 docker:

site/README.md

@@ -47,7 +47,7 @@ In order for the REPL's GitHub integration to work properly when running locally
 
 ## Building the site
 
-To build the website, run `npm run sapper`. The output can be found in `__sapper__/build`.
+To build the website, run `npm run build`. The output can be found in `__sapper__/build`.
 
 ## Testing
 

site/package.json

@@ -6,7 +6,7 @@
     "dev": "npm run copy-workers && sapper dev",
     "copy-workers": "node scripts/copy-workers.js",
     "migrate": "node-pg-migrate -r dotenv/config",
-    "sapper": "npm run copy-workers && sapper build --legacy",
+    "build": "npm run copy-workers && sapper build --legacy",
     "update": "node scripts/update_template.js && node scripts/get-contributors.js && node scripts/update_whos_using.js",
     "start": "node __sapper__/build",
     "test": "mocha -r esm test/**",