docs: tweak deploy guide

docs/guide/deploy.md

 # Deploying
 
-The following guides assumes you are placing your docs inside the `docs` directory of your project and using the default build output location.
+The following guides are based on a few shared assumptions:
+
+- You are placing your docs inside the `docs` directory of your project;
+- You are using the default build output location (`.vuepress/dist`);
+- VuePress is installed as a local dependency in your project, and you have setup the following npm scripts:
+
+``` json
+{
+  "scripts": {
+    "docs:build": "vuepress build docs"
+  }
+}
+```
 
 ## GitHub Pages
 
-1. Set correct `base` in `.vuepress/config.js`. 
+1. Set correct `base` in `.vuepress/config.js`.
 
    If you are deploying to `https://<USERNAME>.github.io/`, you can omit `base` as it defaults to `"/"`.
 
@@ -23,7 +35,7 @@ You can also run this script in your CI setup to enable automatic deployment on
 set -e
 
 # build
-vuepress build docs
+npm run docs:build
 
 # navigate into the build output directory
 cd docs/.vuepress/dist
@@ -46,19 +58,9 @@ cd -
 
 ## Netlify
 
-1. Make sure you have npm scripts for building your docs:
-
-``` json
-{
-  "scripts": {
-    "docs:build": "vuepress build docs"
-  }
-}
-```
-
-2. On Netlify, setup up a new project from GitHub with the following settings:
+1. On Netlify, setup up a new project from GitHub with the following settings:
 
   - **Build Command:** `npm run docs:build` or `yarn docs:build`
   - **Publish directory:** `docs/.vuepress/dist`
 
-3. Hit the deploy button!
+2. Hit the deploy button!