Update Travis config and add Netlify preview of example site

.travis.yml

@@ -1,20 +1,12 @@
 language: python
-python: 3.6
-cache:
-  directories:
-    - $HOME/.cache/pip
-    - $HOME/.cache/lektor/builds
+python: 3.7
 
-install:
-  - "pip install -U pip"
-  - "pip install Lektor"
+install: "ci/install.sh"
 
-script:
-  - "cd example-site"
-  - "lektor build -v"
+script: "ci/build.sh"
 
 deploy:
   provider: script
-  script: "lektor deploy ghpages"
+  script: "lektor deploy ghpages --output-path website-lektor-icon-build"
   on:
     branch: master

README.md

@@ -2,6 +2,9 @@
 
 *Copyright © 2016-2020 Lektor-Icon Contributors and others (see [AUTHORS.txt](https://github.com/spyder-ide/lektor-icon/blob/master/AUTHORS.txt))*
 
+[![Travis status](https://travis-ci.org/spyder-ide/lektor-icon.svg?branch=master)](https://travis-ci.org/spyder-ide/lektor-icon)
+[![Netlify Status](https://api.netlify.com/api/v1/badges/8b768d7f-1623-4134-8cea-0d049894d99c/deploy-status)](https://app.netlify.com/sites/lektor-icon-preview/deploys)
+
 ![Screenshot of Lektor-Icon screenshot section](./images/mainpage-screenshots.png)
 
 This a heavily modified and expanded version of the [FreeHTML5](https://freehtml5.co/) ["Icon" template](https://freehtml5.co/icon-free-website-template-using-bootstrap/) ported to the [Lektor](https://www.getlektor.com/) static CMS by [Daniel Althviz](https://dalthviz.github.io/) and the [Spyder](https://www.spyder-ide.org/) development team; it was initially derived from the [Hugo port](https://github.com/SteveLane/hugo-icon) of the Icon theme by [Steve Lane](https://gtown-ds.netlify.com/).

ci/build.sh

@@ -0,0 +1,4 @@
+#!/bin/bash -ex
+
+cd example-site
+lektor build -v --output-path website-lektor-icon-build

ci/install.sh

@@ -0,0 +1,4 @@
+#!/bin/bash -ex
+
+pip3 install -U pip
+pip3 install -U Lektor

example-site/themes/lektor-icon

@@ -1 +1 @@
-../../../lektor-icon
+../..

netlify.toml

@@ -0,0 +1,15 @@
+# Settings in the [build] context are global and are applied to all contexts
+# unless otherwise overridden by more specific contexts.
+[build]
+  # Directory to change to before starting a build.
+  # This is where we will look for package.json/.nvmrc/etc.
+  # base = "project/"
+
+  # Directory that contains the deploy-ready HTML files and assets generated by
+  # the build. This is relative to the base directory if one has been set, or the
+  # root directory if a base has not been set. This sample publishes the
+  # directory located at the absolute path "root/project/build-output"
+  publish = "example-site/website-lektor-icon-build/"
+
+  # Default build command.
+  command = "ci/install.sh && ci/build.sh"

runtime.txt

@@ -0,0 +1 @@
+3.7