feat: better environment initialization

Migrate env initialization from Dockerfile to standalone script, it
can improve performance and manipuility.

Dockerfile

@@ -5,21 +5,6 @@ LABEL repository="https://github.com/jeffreytse/jekyll-deploy-action"
 LABEL homepage="https://github.com/jeffreytse/jekyll-deploy-action"
 LABEL maintainer="Jeffrey Tse <[email protected]>"
 
-# Update packages database
-RUN pacman -Syu --noconfirm
-
-# Installing git package
-RUN pacman -S --noconfirm git
-
-# Installing ruby libraries
-RUN pacman -S --noconfirm ruby2.7 ruby-bundler
-
-# Setting default ruby version
-RUN cp /usr/bin/ruby-2.7 /usr/bin/ruby
-
-# debug
-RUN ruby -v && bundle version
-
 COPY LICENSE.txt README.md /
 
 COPY script /script

entrypoint.sh

@@ -40,6 +40,10 @@ if [[ "${PROVIDER}" == "github" ]]; then
   fi
 fi
 
+# Initialize environment
+echo "Initialize environment"
+${SCRIPT_DIR}/script/init_environment.sh
+
 cd ${JEKYLL_SRC}
 
 # Check and execute pre_build_commands commands

script/init_environment.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+# Update packages database
+pacman -Syu --noconfirm
+
+# Installing git package
+pacman -S --noconfirm git
+
+# Installing ruby libraries
+pacman -S --noconfirm ruby2.7 ruby-bundler
+
+# Setting default ruby version
+cp /usr/bin/ruby-2.7 /usr/bin/ruby
+
+# debug
+ruby -v && bundle version