feat(docker): introduce variable UID/GID

Dockerfile

@@ -1,4 +1,6 @@
 FROM python:3.10.2-bullseye
+ARG UID=1337
+ARG GID=1337
 
 RUN pip install cachecontrol iso8601 requests lockfile jsonobject six \
     && apt-get update && apt-get install -y rsync cron
@@ -12,10 +14,12 @@ RUN chmod 644 /etc/cron.d/meta-update \
 COPY docker/entrypoint.sh /usr/local/bin/entrypoint
 RUN chmod +x /usr/local/bin/entrypoint
 
-RUN useradd -Um user \
+RUN groupadd -g $GID user \
+    && useradd -m -g $GID -u $UID user \
     && mkdir -p /home/user/.ssh \
     && ssh-keyscan github.com > /home/user/.ssh/known_hosts \
-    && mkdir -p /app
+    && mkdir -p /app \
+    && chown -R $UID:$GID /app /home/user/.ssh
 
 COPY . /app/
 

README.md

@@ -5,7 +5,7 @@ Scripts to generate jsons and jars that PolyMC will access.
 It is recommended to use Docker to deploy the environment.
 
 - Clone this repo to a server
-- Make sure it's writable by the container later: `chown -R 1000:1000 .`
+- Make sure it's writable by the container later: `chown -R 1337:1337 .`
 - Configure `config/config_local.sh`
   - The defaults should be fine (apart from committer email and name perhaps)
 - Put your SSH key (which has push access to meta-upstream and meta-polymc) at `config/deploy.key`
@@ -16,6 +16,9 @@ It is recommended to use Docker to deploy the environment.
 - Observe Cron logs using `docker-compose logs -f` (Runs hourly by default)
 - (Optional) Run once to fill caches: `docker-compose run meta update`
 
+For local development you can also use `docker-compose.local.yaml`. By default it uses `UID=1000` and `GID=1000`.
+Make sure it's the same as your host instance.
+
 ## Usage
 
 ### Install the dependencies

docker-compose.local.yaml

@@ -0,0 +1,16 @@
+version: "3"
+
+services:
+  meta:
+    build:
+      context: .
+      args:
+        UID: 1000
+        GID: 1000
+    command: update
+    volumes:
+      - "./caches:/app/caches"
+      - "./upstream:/app/upstream"
+      - "./polymc:/app/polymc"
+      - "./public:/app/public"
+      - "./config:/app/config"