new resources on env config, databases and bootstrap

mattmakai · mattmakai · commit fe7b1fc48f99 · 2018-07-04T15:02:35.000-04:00
diff --git a/content/pages/02-development-environments/15-environment-configuration.markdown b/content/pages/02-development-environments/15-environment-configuration.markdown
@@ -42,6 +42,10 @@ Other useful environment variables resources:
 
 * [Environment variables in Windows](https://www.digitalcitizen.life/simple-questions-what-are-environment-variables)
 
+* [Security of infrastructure secrets](https://paul.querna.org/articles/2013/11/09/security-of-infrastructure-secrets/)
+  elaborates on techniques to protect your secret tokens such as API keys
+  as well as the threats that are out there which put your secrets at risk.
+
 
 ### Environment configuration resources
 * [Staging Servers, Source Control & Deploy Workflows, And Other Stuff Nobody Teaches You](https://www.kalzumeus.com/2010/12/12/staging-servers-source-control-deploy-workflows-and-other-stuff-nobody-teaches-you/)
diff --git a/content/pages/03-data/01-databases.markdown b/content/pages/03-data/01-databases.markdown
@@ -167,6 +167,11 @@ provider.
 * [Writing better SQL](http://www.craigkerstiens.com/2016/01/08/writing-better-sql/)
   is a short code styling guide to make your queries easier to read.
 
+* [A one size fits all database doesn't fit anyone](https://www.allthingsdistributed.com/2018/06/purpose-built-databases-in-aws.html)
+  explains Amazon Web Services' specific rationale for having so many types 
+  of relational and non-relational databases on its platform but the article
+  is also a good overview of various database models and their use cases.
+
 * [DB-Engines](http://db-engines.com/en/ranking) ranks the most popular
   database management systems.
 
diff --git a/content/pages/04-web-development/21-bootstrap.markdown b/content/pages/04-web-development/21-bootstrap.markdown
@@ -31,3 +31,6 @@ is especially useful as a base layer of
   shows a slew of comparisons for how user interface elements have changed
   design over the past several Bootstrap major version iterations.
 
+* [Tabler](https://github.com/tabler/tabler) is a free, open source admin
+  theme for Bootstrap 4. You can also check out a 
+  [demo of the theme](https://tabler.github.io/tabler/).
