docker: statically build CLI

Dockerfile

@@ -1,11 +1,20 @@
-ARG TAG=22.04
+FROM alpine:latest AS build-stage
 
-FROM ubuntu:${TAG} AS build
-
-### Build stage
-
-# Install curl and git and simplex-chat dependencies
-RUN apt-get update && apt-get install -y curl git build-essential libgmp3-dev zlib1g-dev llvm-12 llvm-12-dev libnuma-dev libssl-dev
+# Alpine Linux doesn't provide libtinfow.so.6 library, so we need to symlink it.
+# Add essential packages for ghc/cabal to work.
+RUN apk add --no-cache \
+    curl \
+    git \
+    xz \
+    grep \
+    ghc-dev \
+    gmp-dev \
+    zlib-static \
+    zlib-dev \
+    openssl-libs-static \
+    openssl-dev \
+    alpine-sdk &&\
+    ln -s /usr/lib/libncursesw.so.6 /usr/lib/libtinfow.so.6
 
 # Specify bootstrap Haskell versions
 ENV BOOTSTRAP_HASKELL_GHC_VERSION=9.6.3
@@ -21,21 +30,30 @@ ENV PATH="/root/.cabal/bin:/root/.ghcup/bin:$PATH"
 RUN ghcup set ghc "${BOOTSTRAP_HASKELL_GHC_VERSION}" && \
     ghcup set cabal "${BOOTSTRAP_HASKELL_CABAL_VERSION}"
 
+# Install hpack
+RUN cabal install --install-method=copy --installdir=/usr/local/bin hpack-0.36.0
+
+# Copy project in PWD to dontainer
 COPY . /project
 WORKDIR /project
 
 # Adjust build
 RUN cp ./scripts/cabal.project.local.linux ./cabal.project.local
 
+# Add optimization flags and build statically  
+RUN sed -i '/- -Wunused-type-patterns/a\  - -O2\n\  - -split-sections\n\  - -with-rtsopts=-N\n\  - -static\n\cc-options: -static\n\ld-options: -static -pthread' package.yaml
+
+# Reconfigure cabal project
+RUN hpack
+
 # Compile simplex-chat
 RUN cabal update
-RUN cabal build exe:simplex-chat
+RUN cabal build -j exe:simplex-chat
 
 # Strip the binary from debug symbols to reduce size
 RUN bin=$(find /project/dist-newstyle -name "simplex-chat" -type f -executable) && \
     mv "$bin" ./ && \
     strip ./simplex-chat
 
-# Copy compiled app from build stage
 FROM scratch AS export-stage
-COPY --from=build /project/simplex-chat /
+COPY --from=build-stage /project/simplex-chat /