Release 7 new icons and 4 updated icons

# New Icons

- Canonical (#3184)
- Der Spiegel (#3168)
- DHL (#3048)
- Land Rover (#3195)
- Openlayers (#3165)
- Prime (#3010)
- Quasar (#3144)

# Updated Icons

- Apache ECharts (#3166)
- Apache Pulsar (#3181)
- Fur Affinity (#2979)
- Jupyter (#3170)

.dockerignore

@@ -0,0 +1,11 @@
+node_modules/
+
+# Jekyll
+_site/
+.sass-cache/
+.jekyll-cache/
+.jekyll-metadata
+
+# Build files
+icons/*.js
+/index.js

.svglintrc.js

@@ -1,7 +1,11 @@
 const data = require("./_data/simple-icons.json");
 const { htmlFriendlyToTitle } = require("./scripts/utils.js");
+const getBounds = require("svg-path-bounding-box");
 
 const titleRegexp = /(.+) icon$/;
+const iconSize = 24;
+const iconFloatPrecision = 3;
+const iconIgnored = require("./.svglint-ignored.json");
 
 module.exports = {
     rules: {
@@ -14,7 +18,7 @@ module.exports = {
         attr: [
             { // ensure that the SVG elm has the appropriate attrs
                 "role": "img",
-                "viewBox": "0 0 24 24",
+                "viewBox": `0 0 ${iconSize} ${iconSize}`,
                 "xmlns": "http://www.w3.org/2000/svg",
 
                 "rule::selector": "svg",
@@ -32,6 +36,8 @@ module.exports = {
         ],
         custom: [
           function(reporter, $, ast) {
+            reporter.name = "icon-title";
+
             const iconTitleText = $.find("title").text();
             if (!titleRegexp.test(iconTitleText)) {
               reporter.error("<title> should follow the format \"[ICON_NAME] icon\"");
@@ -46,6 +52,24 @@ module.exports = {
               }
             }
           },
+          function(reporter, $, ast) {
+            reporter.name = "icon-size";
+
+            const iconPath = $.find("path").attr("d");
+            if (iconIgnored.hasOwnProperty(iconPath)) {
+              return;
+            }
+
+            const bounds = getBounds(iconPath);
+            const width = +bounds.width.toFixed(iconFloatPrecision);
+            const height = +bounds.height.toFixed(iconFloatPrecision);
+
+            if (width === 0 && height === 0) {
+              reporter.error("Path bounds were reported as 0 x 0; check if the path is valid");
+            } else if (width !== iconSize && height !== iconSize) {
+              reporter.error(`Size of <path> must be exactly ${iconSize} in one dimension; the size is currently ${width} x ${height}`);
+            }
+          },
         ]
     }
 };

CONTRIBUTING.md

@@ -13,6 +13,7 @@ Simple Icons welcomes contributions and corrections. Before contributing, please
 * [Requesting an Icon](#requesting-an-icon)
 * [Adding or Updating an Icon](#adding-or-updating-an-icon)
 * [Building the Website](#building-locally)
+* [Using Docker](#using-docker)
 
 ## Requesting an Icon
 
@@ -90,6 +91,12 @@ All icons in Simple Icons have been optimized with the [SVGO tool](https://githu
   * Set the precision to about 3, depending on if there is a loss of quality.
   * Leave the remaining settings untouched (or reset them with the button at the bottom of the settings).
   * Click the download button.
+* The [SVGO Command Line Tool](https://github.com/svg/svgo) in Docker
+  * If none of the options above work for you, it is possible to build a Docker image for compressing the images.
+  * Build: `docker build . -t simple-icons`
+  * Run: `docker run --rm -v ${PWD}/icons/file-to-optimize.svg:/image.svg simple-icons`
+
+After optimizing the icon, double-check it against your original version to ensure no visual imperfections have crept in. Also make sure that the dimensions of the path have not been changed so that the icon no longer fits exactly within the canvas. We currently check the dimensions up to a precision of 3 decimal points.
 
 ### 4. Annotate the Icon
 
@@ -222,6 +229,33 @@ Alternatively, you can build and run the website in a readily configured online
 
 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io#https://github.com/simple-icons/simple-icons)
 
+## Using Docker
+
+You can build a Docker image for this project from the Dockerfile by running:
+
+```bash
+# Build the Docker image for simple-icons (if you haven't yet)
+$ docker build . -t simple-icons
+
+# Start a Docker container for simple-icons and attach to it
+$ docker run -it --rm --entrypoint "/bin/ash" simple-icons
+```
+
+### Jekyll Server using Docker
+
+To use a Docker container to run the Jekyll server for the website, run:
+
+```bash
+# Start a container running `jekyll serve` in the background
+$ docker run -d -p 4000:4000 --rm --volume $PWD:/srv/jekyll --name simple-icons-server jekyll/jekyll jekyll serve
+
+# Inspect the server logs
+$ docker logs simple-icons-server
+
+# Stop the server (and delete the container)
+$ docker stop simple-icons-server
+```
+
 ---
 
 # Versioning

Dockerfile

@@ -0,0 +1,11 @@
+FROM alpine:3.12
+
+RUN apk add --update nodejs npm
+
+WORKDIR /simple-icons
+COPY package*.json /simple-icons/
+RUN npm install
+
+COPY . .
+
+ENTRYPOINT ["npm", "run", "svgo", "--", "/image.svg"]

_data/simple-icons.json

@@ -407,8 +407,8 @@
         },
         {
             "title": "Apache ECharts",
-            "hex": "A9334C",
-            "source": "https://echarts.apache.org/"
+            "hex": "AA344D",
+            "source": "https://apache.org/logos/"
         },
         {
             "title": "Apache Flink",
@@ -438,7 +438,7 @@
         {
             "title": "Apache Pulsar",
             "hex": "188FFF",
-            "source": "https://pulsar.apache.org/"
+            "source": "https://apache.org/logos/"
         },
         {
             "title": "Apache RocketMQ",
@@ -990,6 +990,11 @@
             "hex": "111324",
             "source": "https://www.campaignmonitor.com/company/brand/"
         },
+        {
+            "title": "Canonical",
+            "hex": "77216F",
+            "source": "https://design.ubuntu.com/downloads/"
+        },
         {
             "title": "Canva",
             "hex": "00C4CC",
@@ -1520,6 +1525,11 @@
             "hex": "025E8C",
             "source": "https://dependabot.com/dependabot-logo-symbol-square-mono.svg"
         },
+        {
+            "title": "Der Spiegel",
+            "hex": "E64415",
+            "source": "https://www.spiegel.de/"
+        },
         {
             "title": "Designer News",
             "hex": "2D72D9",
@@ -1540,6 +1550,11 @@
             "hex": "F99A66",
             "source": "https://devrant.com"
         },
+        {
+            "title": "DHL",
+            "hex": "FFCC00",
+            "source": "https://www.dpdhl-brands.com/dhl/en/guides/design-basics/logo-and-claim.html"
+        },
         {
             "title": "Diaspora",
             "hex": "000000",
@@ -2152,7 +2167,7 @@
         },
         {
             "title": "Fur Affinity",
-            "hex": "FAAF3A",
+            "hex": "36566F",
             "source": "https://www.furaffinity.net/"
         },
         {
@@ -3290,6 +3305,11 @@
             "hex": "DDB320",
             "source": "https://en.wikipedia.org/wiki/File:Lamborghini_Logo.svg"
         },
+        {
+            "title": "Land Rover",
+            "hex": "005A2B",
+            "source": "https://www.landrover.com.au/download-a-brochure/index.html"
+        },
         {
             "title": "Laravel",
             "hex": "FF2D20",
@@ -4245,6 +4265,11 @@
             "hex": "F78C40",
             "source": "https://openid.net/add-openid/logos/"
         },
+        {
+            "title": "Openlayers",
+            "hex": "1F6B75",
+            "source": "https://github.com/openlayers/openlayers.github.io/blob/5b93e18b8d302eb49a812fb96abb529895ceb7a2/assets/logo.svg"
+        },
         {
             "title": "OpenSSL",
             "hex": "721412",
@@ -4655,6 +4680,11 @@
             "hex": "3181FF",
             "source": "https://prezi.com/press/kit/"
         },
+        {
+            "title": "Prime",
+            "hex": "00A8E1",
+            "source": "https://www.amazon.com/b?node=17277626011"
+        },
         {
             "title": "Prime Video",
             "hex": "1F2E3E",
@@ -4800,6 +4830,11 @@
             "hex": "4695EB",
             "source": "https://design.jboss.org/quarkus/"
         },
+        {
+            "title": "Quasar",
+            "hex": "1976D2",
+            "source": "https://github.com/quasarframework/quasar-art/blob/cbbbb4b0b7ec7181dfc2d1b29a1ce025e71575bc/src/quasar-logo.svg"
+        },
         {
             "title": "Quest",
             "hex": "FB4F14",