Revert "Try fix #41"

This reverts commit bee9487.

src/Server/Dockerfile

@@ -5,16 +5,11 @@ WORKDIR /app
 EXPOSE 80
 EXPOSE 443
 
-ENV NODE_MAJOR 18
 FROM mcr.microsoft.com/dotnet/sdk:7.0 AS build
-RUN apt-get update && apt-get install -y \
-    ca-certificates \
-    curl \
-    gnupg \
-    && mkdir -p /etc/apt/keyrings \
-    && curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg \
-    && echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_${NODE_MAJOR}.x nodistro main" | tee /etc/apt/sources.list.d/nodesource.list \
-    && apt update && apt install -y nodejs
+RUN apt-get update -yq \
+    && apt-get install curl gnupg -yq \
+    && curl -sL https://deb.nodesource.com/setup_18.x | bash \
+    && apt-get install nodejs -yq
 WORKDIR /src
 COPY ["src/Server/Drogecode.Knrm.Oefenrooster.Server.csproj", "Server/"]
 RUN dotnet restore "Server/Drogecode.Knrm.Oefenrooster.Server.csproj"