devcontainer, updates

Dockerfile

@@ -1,11 +1,7 @@
-FROM php:8.3-cli
+FROM debian:trixie-backports
 
-RUN apt-get update && apt-get install -y \
-        git curl zip unzip \
-        libsqlite3-dev libpng-dev libzip-dev libonig-dev libexif-dev \
-        gmic \
-    && docker-php-ext-install pdo_sqlite gd zip mbstring bcmath pcntl exif \
-    && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y git curl zip unzip
+RUN rm -rf /var/lib/apt/lists/*
 
 # Node.js 22
 RUN curl -fsSL https://deb.nodesource.com/setup_22.x | bash - \