title: Dockerized Dotnet Core 2.1 throws Gdip exception when using Select.HtmlToPdf.NetCore
body: <p>I am using Select.HtmlToPdf.NetCore(18.3.0) to convert Html to pdf in Dotnetcore 2.1. It is perfectly working in local environment but when hosted with Docker it throws an error saying,</p>
  
  <blockquote>
    <p>{"fileName":"System.TypeInitializationException: The type initializer
    for 'Gdip' threw an exception. ---> System.DllNotFoundException:
    Unable to load shared library 'libdl' or one of its dependencies. In
    order to help diagnose loading problems, consider setting the LD_DEBUG
    environment variable: liblibdl: cannot open shared object file: No
    such file or directory\n   at Interop.Libdl.dlopen(String fileName,
    Int32 flag)\n   at
    System.Drawing.SafeNativeMethods.Gdip.LoadNativeLibrary()\n   at
    System.Drawing.SafeNativeMethods.Gdip..cctor()\n   --- End of inner
    exception stack trace ---\n   at
    System.Drawing.SafeNativeMethods.Gdip.GdipNewPrivateFontCollection(IntPtr&amp;
    fontCollection)\n   at SelectPdf.Lib.ᡜ..ctor()\n   at
    SelectPdf.Lib.៞..ctor()\n   at SelectPdf.Lib.៞..ctor(ᡏ A_0, ᠝ A_1)\n<br>
    at SelectPdf.HtmlToPdf.ᜁ(String A_0, String A_1, String A_2, String
    A_3, Boolean A_4)\n   at SelectPdf.HtmlToPdf.ConvertHtmlString(String
    htmlString)</p>
  </blockquote>
  
  <p>I have tried by adding these set of lines in Dockerfile, but still having the same error.  </p>
  
  <pre><code>FROM microsoft/dotnet:2.1-aspnetcore-runtime AS base  
  RUN apt-get update  
  RUN apt-get install -y apt-utils  
  RUN apt-get install -y libgdiplus  
  RUN ln -s /usr/lib/libgdiplus.so /usr/lib/gdiplus.dll  
  WORKDIR /app  
  EXPOSE 80  
  </code></pre>