docker: refactoring (#735)

* build: switch ubuntu image to lunar

* dcoker: support multi-platform builds

* docker: strip binary

* docker: multicore execution

* readme: change docker hub to smp-server

README.md

@@ -105,7 +105,7 @@ apt update && apt install openssl
 
 #### Using Docker
 
-On Linux, you can deploy smp server using Docker. This will download image from [Docker Hub](https://hub.docker.com/r/simplexchat/simplexmq).
+On Linux, you can deploy smp server using Docker. This will download image from [Docker Hub](https://hub.docker.com/r/simplexchat/smp-server).
 
 1. Create `config` and `logs` directories:
 
@@ -121,7 +121,7 @@ On Linux, you can deploy smp server using Docker. This will download image from
        -p 5223:5223 \
        -v $HOME/simplex/config:/etc/opt/simplex:z \
        -v $HOME/simplex/logs:/var/opt/simplex:z \
-       simplexchat/simplexmq:latest
+       simplexchat/smp-server:latest
    ```
 
 #### Ubuntu

build.Dockerfile

@@ -1,5 +1,5 @@
-FROM ubuntu:focal AS final
-FROM ubuntu:focal AS build
+FROM --platform=$BUILDPLATFORM ubuntu:23.04 AS final
+FROM --platform=$BUILDPLATFORM ubuntu:23.04 AS build
 
 ### Build stage
 
@@ -23,6 +23,9 @@ WORKDIR /project
 RUN cabal update
 RUN cabal install
 
+# Strip the binary from debug symbols to reduce size
+RUN strip /root/.cabal/bin/smp-server
+
 ### Final stage
 
 FROM final

scripts/docker/entrypoint

@@ -24,5 +24,5 @@ fi
 
 # Finally, run smp-sever. Notice that "exec" here is important:
 # smp-server replaces our helper script, so that it can catch INT signal
-exec smp-server start
+exec smp-server start +RTS -N -RTS