Running on Docker

Basically you need to install wkhtmltopdf. Below is an example of a docker file.

FROM mcr.microsoft.com/dotnet/aspnet:9.0 AS base

# Install wkhtmltopdf
RUN apt-get -y update && apt-get -y upgrade
RUN apt-get -y install wkhtmltopdf
RUN wkhtmltopdf --version

USER $APP_UID
WORKDIR /app
EXPOSE 8080
EXPOSE 8081

FROM mcr.microsoft.com/dotnet/sdk:9.0 AS build
ARG BUILD_CONFIGURATION=Release
WORKDIR /src
COPY ["playground/OnDocker/Html2Pdf.OnDocker.csproj", "playground/OnDocker/"]
RUN dotnet restore "playground/OnDocker/Html2Pdf.OnDocker.csproj"
COPY . .
WORKDIR "/src/playground/OnDocker"
RUN dotnet build "Html2Pdf.OnDocker.csproj" -c $BUILD_CONFIGURATION -o /app/build

FROM build AS publish
ARG BUILD_CONFIGURATION=Release
RUN dotnet publish "Html2Pdf.OnDocker.csproj" -c $BUILD_CONFIGURATION -o /app/publish /p:UseAppHost=false

FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .

ENTRYPOINT ["dotnet", "Html2Pdf.OnDocker.dll"]

The most important part of this file is...

FROM mcr.microsoft.com/dotnet/aspnet:9.0 AS base

# Install wkhtmltopdf
RUN apt-get -y update && apt-get -y upgrade
RUN apt-get -y install wkhtmltopdf
RUN wkhtmltopdf --version

This command should be right below FROM mcr.microsoft.com/dotnet/aspnet:<<version>> AS base

You can get a complete example by accessing the link https://github.com/angelobelchior/Html2Pdf/tree/main/playground/OnDocker