Add vserver Docker deploy script

deploy/vserver.Dockerfile

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+FROM mcr.microsoft.com/dotnet/aspnet:10.0
+
+WORKDIR /app
+
+ENV ASPNETCORE_URLS=http://+:8080
+ENV DOTNET_EnableDiagnostics=0
+
+EXPOSE 8080
+
+COPY publish/ ./
+
+RUN mkdir -p /app/data
+
+ENTRYPOINT ["dotnet", "RolemasterDb.App.dll"]

deploy/vserver.env.example

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+# SSH host or alias from ~/.ssh/config.
+REMOTE_HOST=myvserver
+
+# Remote filesystem layout.
+REMOTE_APP_DIR=/opt/rolemasterdb
+REMOTE_DATA_DIR=/opt/rolemasterdb/data
+
+# Docker names on the remote host.
+IMAGE_NAME=rolemasterdb
+CONTAINER_NAME=rolemasterdb
+
+# Port mapping: host:container.
+HOST_PORT=8080
+CONTAINER_PORT=8080
+
+# Set to 1 if docker on the server must be run through sudo.
+REMOTE_USE_SUDO=0
+
+# Optional env file that already exists on the server and should be passed
+# through to docker run with --env-file.
+REMOTE_ENV_FILE=
+
+# Prefix used for the generated local tarball name.
+RELEASE_PREFIX=rolemasterdb