fix, was not using postgres

DockerFile

@@ -5,4 +5,5 @@ RUN cd btcpayserver && dotnet restore && cd BTCPayServer && dotnet build -c Debu
 EXPOSE 23001
 WORKDIR /btcpayserver/BTCPayServer
 ENTRYPOINT ["dotnet", "bin/Debug/netcoreapp2.0/BTCPayServer.dll"]
-CMD ["--testnet", "--explorercookiefile=/.cookie", "--explorerurl=https://nbxplorer-testnet-public.azurewebsites.net/", "--bind=0.0.0.0", "--postgres=\"User ID=postgres;Host=postgres;Port=54320;Database=btcpayserver\""]
+ENV POSTGRES="User ID=postgres;Host=postgres;Port=5432;Database=btcpayserver"
+CMD ["--testnet", "--explorercookiefile=/.cookie", "--explorerurl=https://nbxplorer-testnet-public.azurewebsites.net/", "--bind=0.0.0.0"]

README.md

@@ -15,6 +15,8 @@ If you want to refresh the btcpay image up to the latest master, you need to reb
 
 ```
 docker build . -t btcpay --no-cache
+docker-compose build
+docker-compose up
 ```
 
 By default this will connect to a NBXplorer instance hosted by me, on which I can make no promise of avaialability.