Started adding MozJpeg compression

CompressImagesFunction/CompressImages.cs

@@ -20,6 +20,7 @@ public static class CompressImages
         {
             new ImageMagickCompress(),
             new SvgoCompress(),
+            new MozJpegCompress(),
         };
 
         public static bool Run(CompressimagesParameters parameters, ILogger logger)
@@ -177,6 +178,7 @@ private static CompressionResult[] OptimizeImages(Repository repo, string localP
                                     if (aggressiveCompression)
                                     {
                                         optimizer.LossyCompress(image);
+                                        optimizer.LosslessCompress(image);
                                     }
                                     else
                                     {

CompressImagesFunction/Compressors/MozJpegCompress.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Diagnostics;
+using System.Linq;
+
+namespace CompressImagesFunction.Compressors
+{
+    public class MozJpegCompress : ICompress
+    {
+        private static string[] losslessPlugins = new[] { "jpegtran", };
+        private static string[] lossyPlugins = losslessPlugins.Concat(new[] { "cjpeg", }).ToArray();
+
+        public string[] SupportedExtensions => new[] { ".jpg", ".jpeg" };
+
+        public void LosslessCompress(string path)
+        {
+            Compress(path, losslessPlugins);
+        }
+
+        public void LossyCompress(string path)
+        {
+            Compress(path, lossyPlugins);
+        }
+
+        private void Compress(string path, string[] plugins)
+        {
+            var processStartInfo = new ProcessStartInfo
+            {
+                UseShellExecute = false,
+                CreateNoWindow = true,
+                FileName = "mozjpeg",
+                Arguments = $"{path} --config=\"{{\"\"full\"\":true}}\" -quality --enable={string.Join(",", plugins)}"
+            };
+            using (var process = Process.Start(processStartInfo))
+            {
+                process.WaitForExit(10000);
+            }
+        }
+    }
+}

Dockerfile.CompressImages

@@ -16,6 +16,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends --no-install-su
 RUN curl -sL https://deb.nodesource.com/setup_10.x | bash -
 RUN apt-get install -y nodejs
 RUN npm install -g svgo@^1.3.0
+RUN npm install mozjpeg
 
 ENV AzureWebJobsScriptRoot=/home/site/wwwroot
 COPY --from=dotnet ["/home/site/wwwroot", "/home/site/wwwroot"]