Update build.yml

.github/workflows/build.yml

@@ -10,33 +10,22 @@ jobs:
   linux:
     name: Linux Build
     runs-on: ubuntu-latest
+    container: ubuntu:18.04
 
     steps:
     - uses: actions/checkout@v4
 
     - name: Add i386 architecture
-      run: sudo dpkg --add-architecture i386
+      run: dpkg --add-architecture i386
 
     - name: Update repository
-      run: |
-        sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 40976EAF437D05B5
-        sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 3B4FE6ACC0B21F32
-        sudo su -c "echo 'deb http://archive.ubuntu.com/ubuntu/ bionic main restricted universe multiverse' >> /etc/apt/sources.list"
-        sudo apt-get update
+      run: apt-get update
 
     - name: Install build dependencies
-      run: sudo apt-get install -qq -y wget unzip
-
-    - name: Instal GCC 4.7 (multilib)
-      run: |
-        sudo apt-get install gcc-4.7
-        
-    - name: Update GCC and G++ alternatives
-      run: |
-        sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.7 50
-        sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.7 50
-        sudo update-alternatives --config gcc
-        sudo update-alternatives --config g++
+      run: apt-get install -qq -y wget unzip build-essential gcc-4.8-multilib g++-4.8-multilib libgcc1:i386
+
+    - name: Update alternatives
+      run: update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.8 100 --slave /usr/bin/g++ g++ /usr/bin/g++-4.8
 
     - name: Run build
       working-directory: ./MatchBot