Added docker build script with local pre-build stage

Dockerfile.local

@@ -0,0 +1,2 @@
+FROM httpd:alpine
+COPY dist/ /usr/local/apache2/htdocs/

build.py

@@ -0,0 +1,37 @@
+from pathlib import Path
+from shutil import rmtree
+from subprocess import PIPE, run
+
+
+def buildx(repository: str, tags: list[str], build_platforms: list[str], dockerfile: str = "Dockerfile", build_args: dict[str, str] | None = None, directory: str = ".", push: bool = True, pull: bool = False, progress: str = "auto", write_command: bool = False):
+    if build_args is None:
+        build_args = dict()
+    labels = [f"{repository}:{tag}" for tag in tags]
+    command = list(filter(None, ["docker", "buildx", "build",
+                                 "--platform", ",".join(build_platforms),
+                                 *[t for (key, value) in build_args.items()
+                                   for t in ("--build-arg", f"{key}={value}")],
+                                 "--file", dockerfile,
+                                 *[t for label in labels for t in ("--tag", label)],
+                                 f"--progress={progress}",
+                                 "--pull" if pull else None,
+                                 "--push" if push else None,
+                                 directory]))
+    if write_command:
+        print(" ".join(command))
+    run(command, check=True)
+
+if __name__ == '__main__':
+    output_path = Path("dist")
+    if output_path.exists():
+        rmtree(output_path)
+    output_path.mkdir()
+    run(["python", "createreadmes.py"], check=True)
+    run(["bundle.bat", "exec", "jekyll", "build", "--destination", output_path], check=True)
+    branch = run(["git", "branch", "--show-current"],
+                 stdout=PIPE, check=True).stdout.decode().strip()
+    short_sha = run(["git", "rev-parse", "--short", "HEAD"],
+                    stdout=PIPE, check=True).stdout.decode().strip()
+    platforms = ['linux/amd64', 'linux/arm/v6', 'linux/arm/v7',
+                 'linux/arm64/v8', 'linux/386', 'linux/ppc64le', 'linux/s390x']
+    buildx("chenio/code2dfd", [branch, short_sha], platforms, dockerfile="Dockerfile.local")