Try release and docekrfile without tsc.

Dockerfile

@@ -1,24 +1,12 @@
 FROM mcr.microsoft.com/dotnet/sdk:5.0 AS build
 WORKDIR /source
 
-ENV NODE_VERSION=12.6.0
-RUN apt install -y curl
-RUN curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.34.0/install.sh | bash
-ENV NVM_DIR=/root/.nvm
-RUN . "$NVM_DIR/nvm.sh" && nvm install ${NODE_VERSION}
-RUN . "$NVM_DIR/nvm.sh" && nvm use v${NODE_VERSION}
-RUN . "$NVM_DIR/nvm.sh" && nvm alias default v${NODE_VERSION}
-ENV PATH="/root/.nvm/versions/node/v${NODE_VERSION}/bin/:${PATH}"
-RUN node --version
-RUN npm --version
-RUN npm install -g typescript
 COPY . .
 RUN dotnet restore
 
 WORKDIR /source/RazorTemplate
 RUN dotnet publish -c release -o /app --no-restore
 
-
 FROM mcr.microsoft.com/dotnet/aspnet:5.0 AS runtime
 WORKDIR /app
 COPY --from=build /app ./

RazorTemplate/RazorTemplate.csproj

@@ -6,10 +6,6 @@
     <RazorCompileOnPublish>false</RazorCompileOnPublish>
   </PropertyGroup>
 
-  <Target Name="Bundle" BeforeTargets="BeforePublish">
-    <Exec Command="tsc wwwroot/assets/js/dtos.ts" />
-  </Target>
-
   <ItemGroup>
     <Folder Include="wwwroot\" />
   </ItemGroup>