use ubuntu 20 instead of 18, can't go lower anymore

Author: AmyrAhmady

.github/workflows/build-linux-x64.yml

@@ -22,12 +22,12 @@ jobs:
         run: |
           chmod -R 777 ./
           cd docker
-          cd ubuntu_18.04-x64
+          cd ubuntu_20.04-x64
           chmod +x ./build.sh
           chmod +x ./docker-entrypoint.sh
           ./build.sh
       - name: Upload libnode.so.108 artifact
         uses: actions/upload-artifact@v4
         with:
           name: libnode.so.108-x64
-          path: docker/ubuntu_18.04-x64/out/Release/libnode.so.108
+          path: docker/ubuntu_20.04-x64/out/Release/libnode.so.108

.github/workflows/build-linux-x86.yml

@@ -24,12 +24,12 @@ jobs:
         run: |
           chmod -R 777 ./
           cd docker
-          cd ubuntu_18.04-x86
+          cd ubuntu_20.04-x86
           chmod +x ./build.sh
           chmod +x ./docker-entrypoint.sh
           ./build.sh
       - name: Upload libnode.so.108 artifact
         uses: actions/upload-artifact@v4
         with:
           name: libnode.so.108-x86
-          path: docker/ubuntu_18.04-x86/out/Release/libnode.so.108
+          path: docker/ubuntu_20.04-x86/out/Release/libnode.so.108

docker/ubuntu_18.04-x64/Dockerfile docker/ubuntu_20.04-x64/Dockerfiledocker/ubuntu_18.04-x64/Dockerfile renamed to docker/ubuntu_20.04-x64/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:20.04
 RUN \
     # apt remove gcc && \
     # apt remove g++ && \

docker/ubuntu_18.04-x64/build.sh docker/ubuntu_20.04-x64/build.shdocker/ubuntu_18.04-x64/build.sh renamed to docker/ubuntu_20.04-x64/build.sh

@@ -1,4 +1,4 @@
-FROM i386/ubuntu:18.04
+FROM i386/ubuntu:20.04
 RUN \
     # apt remove gcc && \
     # apt remove g++ && \