[Chore] Allow setting the uid/gid of the FPM image (#145)

README.md

@@ -325,7 +325,16 @@ A `Dockerfile` is available for you to compile the image.
 
 To build the checked out version, just run:
 
-    docker build --pull --file docker/Dockerfile --tag davis:latest .
+    docker build --pull --file docker/Dockerfile --tag davis:latest --build-arg fpm_user=82:82 .
+
+> [!TIP]
+> 
+> The `fpm_user` build arg allows to set:
+>  - the uid FPM will run with
+>  - the owner of the app folder
+>
+> This is helpful if you have a proxy that does not use the same default PHP Alpine uid/gid for www-data (82:82). For instance, in the docker compose file, nginx uses 101:101
+>
 
 This will build a `davis:latest` image that you can directly use. Do not forget to pass sensible environment variables to the container since the _dist_ `.env` file will take precedence if no `.env.local` or environment variable is found.
 

docker/Dockerfile

@@ -1,5 +1,9 @@
 FROM php:8.2-fpm-alpine
 
+# https://github.com/docker-library/php/blob/master/8.2/alpine3.18/fpm/Dockerfile#L33
+ARG fpm_user=82:82
+ENV FPM_USER=${fpm_user}
+
 LABEL org.opencontainers.image.authors="tchap@tchap.me"
 LABEL org.opencontainers.image.url="https://github.com/tchapi/davis/pkgs/container/davis"
 LABEL org.opencontainers.image.description="A simple, fully translatable admin interface for sabre/dav based on Symfony 5 and Bootstrap 4"
@@ -77,6 +81,9 @@ RUN curl https://raw.githubusercontent.com/renatomefi/php-fpm-healthcheck/v0.5.0
 RUN docker-php-source delete
 RUN rm -rf /usr/local/bin/composer
 
-RUN chown -R www-data:www-data var
+# Sets the app folder owner as the FPM user
+RUN chown -R ${FPM_USER} .
+
+USER $FPM_USER
 
 HEALTHCHECK --interval=30s --timeout=1s CMD php-fpm-healthcheck || exit 1

docker/docker-compose.yml

@@ -4,7 +4,7 @@ name: "davis-docker"
 services:
 
   nginx:
-    image: nginx:1.23-alpine
+    image: nginx:1.25-alpine
     container_name: nginx
     command: "/bin/sh -c 'while :; do sleep 6h & wait $${!}; nginx -s reload; done & nginx -g \"daemon off;\"'"
     depends_on:
@@ -32,6 +32,8 @@ services:
     build:
       context: ../
       dockerfile: ./docker/Dockerfile
+      args:
+        fpm_user: 101:101
     image: davis:latest
     # If you want to use a prebuilt image from Github
     # image: ghcr.io/tchapi/davis:edge