build: update build sequence to use STDLIB_BRANCH environment variable

PR-URL: #102
Ref: #101
Co-authored-by: Athan Reines <kgryte@gmail.com>
Reviewed-by: Athan Reines <kgryte@gmail.com>

Author: duaneatat

docs/build.md

@@ -40,7 +40,7 @@ Building the website **requires** the following prerequisites:
 To install dependencies,
 
 ```bash
-$ make install
+$ npm install
 ```
 
 * * *

etc/docker/api_docs_server.conf

@@ -67,7 +67,7 @@ WORKDIR /srv/www/stdlib.io
 COPY package*.json ./
 
 # Install application dependencies:
-RUN npm run install:production
+RUN npm install
 
 # Copy over the application source:
 COPY . .