Add linux-x64 compile target

ci/linux-x64/Dockerfile

@@ -0,0 +1,3 @@
+FROM debian:latest
+RUN apt update && apt upgrade -y && apt install -y git cmake build-essential libx11-dev libgtk-3-dev python3 python3-pip
+RUN ln -s /usr/bin/python3 /usr/bin/python

ci/linux-x64/docker-compose.yml

@@ -0,0 +1,18 @@
+services:
+  dawn-linux64:
+    build: .
+    volumes:
+      - ./../../:/Dawn
+    working_dir: /Dawn
+    command:
+      - /bin/sh
+      - -c
+      - |
+        ln -s /usr/bin/python3 /usr/bin/python
+        if [ ! -d ./lib/glfw ]; then
+          git submodule update --init
+        fi
+        mkdir -p ./build/linux-x64
+        cd ./build/linux-x64
+        cmake ../.. -DDAWN_BUILD_SYSTEM=linux -DGLFW_BUILD_X11=ON -DGLFW_BUILD_WAYLAND=OFF
+        make