🐛 fix running on mac

Dockerfile

@@ -1,11 +1,16 @@
-FROM docker.io/library/python:3-alpine
+# syntax=docker/dockerfile:1
+
+ARG BASE_IMAGE=docker.io/library/python:3-alpine
+ARG APP_DIR=/hoster
+
+FROM ${BASE_IMAGE}
 
 RUN pip3 install docker
-RUN mkdir /hoster
+
-WORKDIR /hoster
+ARG APP_DIR=/hoster
-ADD hoster.py /hoster/
+WORKDIR ${APP_DIR}
+
+ADD hoster.py ./
 
 CMD ["python3", "-u", "hoster.py"]
-
+# CMD "whoami"
-
-

docker-compose.yaml

@@ -0,0 +1,12 @@
+# This file replaces `docker build -t docker-hoster .`
+# Run this with `docker-compose build`
+version: '3.8'
+
+services:
+  host-hostnames:
+    container_name: 'host-hostnames'
+    build:
+      context: '.'
+    volumes:
+      - '/var/run/docker.sock:/tmp/docker.sock:ro'
+      - '/etc/hosts:/tmp/hosts'

hoster.py

@@ -125,7 +125,7 @@ def update_hosts_file():
         aux_hosts.writelines(lines)
 
     #replace etc/hosts with aux file, making it atomic
-    shutil.move(aux_file_path, hosts_path)
+    shutil.copyfile(aux_file_path, hosts_path)
 
 
 def parse_args():